题目内容

下面各题怎么简便就怎么计算。
(1)9.12+4.5+0.88 (2)8.43+2.97+0.03
(3)10-2.75-0.25 (4)4.9+4.9-0.9-0.9
(5)5.6+2.7-3.6 (6)12.25-3.1+0.75-4.9
(1)原式=9.12+0.88+4.5
                =14.5
(2)原式=8.43+(2.97+0.03)
                =11.43
(3)原式=10-(2.75+0.25)
                =7
(4)原式= 4.9-0.9+4.9-0.9
                =8
(5)原式=5.6-3.6+2.7
                = 4.7
(6)原式=12.25+0.75-(3.1+4.9)
                =8
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