问题 解答题
计算下面各题.
3.2×2.5+7.280.75×18-0.153.8+2.74×1.55.5×17.3+6.7×5.5.
答案

(1)3.2×2.5+7.28

=8+7.28

=15.28;

(2)0.75×18-0.15

=13.5-0.15

=13.35;

(3)3.8+2.74×1.5

=3.8+4.11

=7.91;

(4)5.5×17.3+6.7×5.5

=5.5×(17.3+6.7)

=5.5×24

=132.

解答题
单项选择题