Question

脱式计算（能简算就简算）

（0.125×8－0.5）×4 105×8.6－8.6×4－8.6

1.8＋18÷1.5－0.5×0.3 （0.62＋7.638÷0.1）÷0.25

Answer 1

（0.125×8－0.5）×4 =（1-0.5）*4=0.5*4=2
105×8.6－8.6×4－8.6=（105-4-1）*8.6=100*8.6=860
1.8＋18÷1.5－0.5×0.3 =1.8+12-0.15=13.65

（0.62＋7.638÷0.1）÷0.25=（0.62+76.38）/0.25=77/0.25=308

Answer 2

4.02＋5.4＋0.98
5.17－1.8－3.2
13.75－(3.75＋6.48)

3.68＋7.56－2.68
7.85＋2.34－0.85＋4.66
35.6－1.8－15.6－7.2

3.82＋2.9＋0.18＋9.1
9.6＋4.8－3.6
7.14－0.53－2.47

5.27＋2.86－0.66＋1.63
13.35－4.68＋2.65
47.8－7.45+8.8

0.398+0.36+3.64
15.75+3.59－0.59+14.25
42.5－(6.07＋1.13)

73.8－1.64－13.8－5.36
66.86－8.66－1.34
0.25×16.2×4

3.72×3.5＋6.28×3.5
36.8－3.9－6.1 2
5.48－(9.4－0.52)

4.8×7.8＋78×0.52
3.6×102
6.4×0.25＋3.6÷4

32＋4.9－0.9
4.8－4.8×0.5
(1.25－0.125)×8

4.8×100.1
56.5×9.9＋56.5
7.09×10.8－0.8×7.09

4.2÷3.5
320÷1.25÷8
18.76×9.9＋18.76

3.52÷2.5÷0.4
4.78÷0.2＋3.44
3.9－4.1＋6.1－5.9

0.49÷1.4
1.25×2.5×32
3.6－0.6×2

3.65×10.1
3.6－3.6×0.8
15.2÷0.25÷4

5.6÷3.5
9.6÷0.8÷0.4
4.2×99＋4.2

0.89×100.1
146.5－(23＋46.5)
17.8÷(1.78×4)

5.83×2＋4.27
(45.9－32.7)÷8÷0.125
9.7×99＋9.7

4.36×12.5×8
15.6×13.1－15.6－15.6×2.1
0.65×101

27.5×3.7－7.5×3.7
8.54÷2.5÷0.4
3.83×4.56＋3.

Answer 3

7/12*1/5+3/12除以5
=7/12*1/5+3/12*1/5
=1/5*(7/12+3/12)
=1/5*5/6
=1/6

5/9*6/25除以3/10
=5/9*6/25*10/3
=4/9

12*(3/4-1/24)
=12*3/4-12*1/24
=9-1/2
=8又1/2