问题 解答题

下面各题怎么计算简便就怎么计算.

9.12+4.5+0.88

8.43+2.97+0.03

10-2.75-0.25

4.9+4.9-0.9-0.9

5.6+2.7-3.6

15.25-3.1+0.75-4.9.

答案

①9.12+4.5+0.88,

=(9.12+0.88)+4.5

=14.5;

②8.43+2.97+0.03,

=8.43+(2.97+0.03),

=8.43+3,

=11.43;

③10-2.75-0.25,

=10-(2.75-0.25),

=10-3,

=7;

④4.9+4.9-0.9-0.9,

=(4.9-0.9)+(4.9-0.9),

=4+4,

=8;

⑤5.6+2.7-3.6,

=(5.6-3.6)+2.7,

=2+2.7,

=4.7;

⑥15.25-3.1+0.75-4.9

=(15.25+0.75)-(3.1+4.9),

=16-8,

=8.

多项选择题
多项选择题