Question

数学脱式计算，简便运算（两步以上）要答案

一定要带答案，我要把它做一个练习册，要答案才能分析，谢谢了！要答案！！！，最好多写些，有急用！！

Answer 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

I32×125×25
=4×8×125×25
=（4×25）×（8×125）
=100×1000
=100000

9048÷268
=（2600+2600+2600+1248）÷26
=2600÷26+2600÷26+2600÷26+1248÷269
=100+100+100+48
=348

2881÷ 43
=（1290+1591）÷ 434
=1290÷43+1591÷43
=30+37

3.2×42.3×3.75-12.5×0.423×16
=3.2×42.3×3.75-1.25×42.3×1.6
=42.3×(3.2×3.75-1.25×1.6)
=42.3×(4×0.8×3.75-1.25×4×0.4)
=42.3×(4×0.4×2×3.75-1.25×4×0.4)
=42.3×(4x0.4x7.5-1.25x4x0.4)
=42.3×[4×0.4×(7.5-1.25)]
=42.3×[4×0.4×6.25]
=42.3×(4×2.5)
=4237
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

(80-9.8)×5分之2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76

8×7分之4÷[1÷(3.2-2.95)]
=8×4/7÷[1÷0.25]
=8×4/7÷4
=8/7

2700×（506－499）÷900
=2700×7÷900
=18900÷900
=21

33.02－（148.4－90.85）÷2.5
=33.02－57.55÷2.5
=33.02－23.02
=10

（1÷1－1）÷5.1
=（1－1）÷5.1
=0÷5.1
=0

18.1＋（3－0.299÷0.23）×1
=18.1＋1.7×1
=18.1＋1.7
=19.8

1.(1/69+2/71)乘23+25除以71
=1/69*23+2/71*23+25/71
=1/3+(46/71+25/71)
=1/3+1
=4/3

2.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘........乘(1+1/9)乘(1-1/9)

=3/2*1/2*4/3*2/3...*10/9*8/9

=1/2*10/9(中间的都约去了）

=5/9

3.1/2乘3+1/3乘4+.......+1/19乘20

=1/2-1/3+1/3-1/4+...+1/19-1/20

=1/2-1/20

=9/20

4.1/27+505/2727+131313/272727

=1/27+5*101/(27*101)+13*10101/(27*10101)

=1/27+5/27+13/27

=19/27

5.100-98+96-94+....+4-2

=(100-98)+(96-94)+...(4-2)

=2+2+...+2(共有25个）

=2*25

=50

1. 3/7 × 49/9 - 4/3=7/3-4/3=3/3=1

2. 8/9 × 15/36 + 1/27=10/27+1/27=11/27

3. 12× 5/6 – 2/9 ×3=10-2/3=30/3-2/3=28/3

4. 8× 5/4 + 1/4=10+1/4=40/4+1/4=41/4

5. 6÷ 3/8 – 3/8 ÷6=6*8/3-3/8*1/6=16-1/16=155/16

6. 4/7 × 5/9 + 3/7 × 5/9=1/7*（4*5/9+3）=1/7*47/9=47/63

7. 5/2 -（ 3/2 + 4/5 ）=5/2-3/2-4/5=1-4/5=5/5-4/5=1/5

8. 7/8 + （ 1/8 + 1/9 ）=7/8+1/8+1/9=1+1/9=10/9

9. 9 × 5/6 + 5/6=（9+1）*5/6=50/6

10. 3/4 × 8/9 - 1/3=（3/4*8/3-1）*1/3=1*1/3=1/3

11. 7 × 5/49 + 3/14=（7*5/7+3/2）*1/7=13/14

12. 6 ×（ 1/2 + 2/3 ）=3+4=7

13. 8 × 4/5 + 8 × 11/5=8*（4/5+11/5）=8*3=24

14. 31 × 5/6 – 5/6=（31-1）*5/6=25

15. 9/7 - （ 2/7 – 10/21 ）=9/7-2/7+10/21=1+10/21=31/21

追问

这个我写过还有没有别的？

追答

亲，我又找了一些没有答案的自己算出来的，还有一些是自己编的，不知道您写过没有呢
77-46+32
=31+32
=63

65-38+26
=27+26
=53

79+19-56
=98-56
=42

69-(39-23)
=69-16
=50

（2＋7）×8
=9x8
=72

（58-34）÷8
=24÷8
=3

84-27+16
=57+16
=73

4+27-16
=31-16
=15

99+（25-24）
=99+1
=100

1+14-15
=15-15
=0

2+8+30
=10+30
=40

36÷6+4
=6+4
=10

7x7+1
=49+1
=50

2x4x5
=8x5
=40

27+3+25
=30+25
=55

100-3x33
=100-99
=1

55÷11+5
=5+5
=10

67+3+20
=70+20
=90

（59+1）÷2
=60÷2
=30

98+2-100
=100-100
=0

520-20+500
=500+500
=1000

6666÷6666+9
=1+9
=10

（365-5）÷36
=360÷36
=10

33+66+1
=99+1
=100

（100+25）÷25
=125÷25
=5

（520+250）÷77
=770÷77
=10

追问

可以，谢谢了

可以，谢谢了

Answer 2

25x32x125 2.9x8+2.9x92 39+58+61
=25x4x8x125 =2.9x（8+92） =39+61+58
=（25x4）x（8x125） =2.9x100 =100+58
=100x1000 =290 =158
=100000

追问

能不能再多一点

Answer 3

999+999+1001=（1000-1）+999+（1000+1）=（1000-1）+（1000+1）+999=2999

追问

能不能多一点，有点少

能不能多一点，有点少

Answer 4

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

追问

还有没有了？

还有没有了？