140×8=1120, 0.2×0.2=0.04, 0.125×16=2, 3.5-3.05=0.45,
1
2 +
1
3 =
5
6 ,
9
8 ×
16
27 =
2
3 , 1÷(1÷7)=7,
15
37 ×
38
99 +
15
37 ×
61
99 =
15
37 .
140×8=1120, 0.2×0.2=0.04, 0.125×16=2, 3.5-3.05=0.45,
1
2 +
1
3 =
5
6 ,
9
8 ×
16
27 =
2
3 , 1÷(1÷7)=7,
15
37 ×
38
99 +
15
37 ×
61
99 =
15
37 .