问题 解答题

计算下面各题.

3.52+8.4+2.6

5.94+6.7+1.06+0.3

42.24-6.24-3.76

4.92+3.27-4.92+3.73.

答案

(1)3.52+8.4+2.6,

=3.52+(8.4+2.6),

=3.52+11,

=14.52;

(2)5.94+6.7+1.06+0.3,

=(5.94+1.06)+(6.7+0.3),

=7+7,

=14;

(3)42.24-6.24-3.76,

=42.24-(6.24+3.76),

=42.24-10,

=32.24;

(4)4.92+3.27-4.92+3.73,

=(4.92-4.92)+(3.27+3.73),

=0+7,

=7.

单项选择题
单项选择题