Question

13.45-4.8+2.55脱式计算？

Answer 1

5.4÷1.8+240×1.5=3+360=363
9000÷72×(1.25×0.7×8)=9000÷72×7=125×7=875

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

9999×1001=9999×(1000+1)=9999×1000+9999×1=10008999

14.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)
=8.3×10=83

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

933-157-43=933-(157+43)=933-200=733

4821-998=4821-1000+2=3823

32×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=100000

1.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.65

6.5×8+3.5×8-47=52+28-47=80-47=33

3.7x2.56-2.3=9.472-2.3=7.172

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

61-(1.25+2.5×0.7)=61-3=58
[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05

408－12×24 = 408 - 288 = 120（46＋28）×60 = 74 x 60 = 4440

42×50－17 = 2100- 17 = 2083

32＋105÷5 = 32 + 21 = 53

420×（327－238） = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

3.416÷（0.016×35） = 3.416 ÷0.56 = 6.1

0.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15

5.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
20×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05
194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=950

24÷2.4－2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

6-1.6÷4= 6- 0.4 = 5.6

32.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97

（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000

Answer 2

5.4÷1.8+240×1.5=3+360=363
9000÷72×(1.25×0.7×8)=9000÷72×7=125×7=875

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

9999×1001=9999×(1000+1)=9999×1000+9999×1=10008999

14.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)
=8.3×10=83

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

933-157-43=933-(157+43)=933-200=733

4821-998=4821-1000+2=3823

32×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=100000

1.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.65

6.5×8+3.5×8-47=52+28-47=80-47=33

3.7x2.56-2.3=9.472-2.3=7.172

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

61-(1.25+2.5×0.7)=61-3=58
[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05

408－12×24 = 408 - 288 = 120（46＋28）×60 = 74 x 60 = 4440

42×50－17 = 2100- 17 = 2083

32＋105÷5 = 32 + 21 = 53

420×（327－238） = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

3.416÷（0.016×35） = 3.416 ÷0.56 = 6.1

0.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15

5.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
20×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05
194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=950

24÷2.4－2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

6-1.6÷4= 6- 0.4 = 5.6

32.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97

（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000

Answer 3

5.4÷1.8+240×1.5=3+360=363
9000÷72×(1.25×0.7×8)=9000÷72×7=125×7=875

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

9999×1001=9999×(1000+1)=9999×1000+9999×1=10008999

14.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)
=8.3×10=83

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

933-157-43=933-(157+43)=933-200=733

4821-998=4821-1000+2=3823

32×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=100000

1.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.65

6.5×8+3.5×8-47=52+28-47=80-47=33

3.7x2.56-2.3=9.472-2.3=7.172

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

61-(1.25+2.5×0.7)=61-3=58
[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05

408－12×24 = 408 - 288 = 120（46＋28）×60 = 74 x 60 = 4440

42×50－17 = 2100- 17 = 2083

32＋105÷5 = 32 + 21 = 53

420×（327－238） = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

3.416÷（0.016×35） = 3.416 ÷0.56 = 6.1

0.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15

5.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
20×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05
194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=950

24÷2.4－2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

6-1.6÷4= 6- 0.4 = 5.6

32.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97

（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000

Answer 4

5.4÷1.8+240×1.5=3+360=363
9000÷72×(1.25×0.7×8)=9000÷72×7=125×7=875

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

9999×1001=9999×(1000+1)=9999×1000+9999×1=10008999

14.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)
=8.3×10=83

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

933-157-43=933-(157+43)=933-200=733

4821-998=4821-1000+2=3823

32×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=100000

1.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.65

6.5×8+3.5×8-47=52+28-47=80-47=33

3.7x2.56-2.3=9.472-2.3=7.172

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

61-(1.25+2.5×0.7)=61-3=58
[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05

408－12×24 = 408 - 288 = 120（46＋28）×60 = 74 x 60 = 4440

42×50－17 = 2100- 17 = 2083

32＋105÷5 = 32 + 21 = 53

420×（327－238） = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

3.416÷（0.016×35） = 3.416 ÷0.56 = 6.1

0.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15

5.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
20×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05
194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=950

24÷2.4－2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

6-1.6÷4= 6- 0.4 = 5.6

32.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97

（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000

Answer 5

5.4÷1.8+240×1.5=3+360=363
9000÷72×(1.25×0.7×8)=9000÷72×7=125×7=875

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

9999×1001=9999×(1000+1)=9999×1000+9999×1=10008999

14.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)
=8.3×10=83

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

933-157-43=933-(157+43)=933-200=733

4821-998=4821-1000+2=3823

32×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=100000

1.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.65

6.5×8+3.5×8-47=52+28-47=80-47=33

3.7x2.56-2.3=9.472-2.3=7.172

1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78

1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5

4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=48

2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8

3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7

3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1

0.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=1000

1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.5

9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2

1.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.9

61-(1.25+2.5×0.7)=61-3=58
[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.05

408－12×24 = 408 - 288 = 120（46＋28）×60 = 74 x 60 = 4440

42×50－17 = 2100- 17 = 2083

32＋105÷5 = 32 + 21 = 53

420×（327－238） = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

3.416÷（0.016×35） = 3.416 ÷0.56 = 6.1

0.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15

5.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
20×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05
194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=950

24÷2.4－2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

6-1.6÷4= 6- 0.4 = 5.6

32.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97

（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000