问题 解答题
脱式计算.(能简算的要简算)
(50-40×1.2)÷0.5
8×4×125×25
18.8-
2
3
-3.8-
1
3

32×71.1+28.9×32.
答案

①(50-40×1.2)÷0.5

=(50-48)÷0.5

=2÷0.5

=4;

②8×4×125×25

=(8×125)×(4×25)

=1000×100

=100000;

③18.8-

2
3
-3.8-
1
3

=(18.8-3.8)-(

2
3
+
1
3

=15-1

=14;

④32×71.1+28.9×32

=32×(71.1+28.9)

=32×100

=3200.

单项选择题
单项选择题