题目内容
用简便方法计算下面各题。
|
(1)原式=732+268+580 =1000+580 =1580 |
(2)原式=1200-(627+73) =1200-700 =500 |
(3)原式=625+75+(49+51) =700+100 =800 |
(4)原式=657+43-(68+132) =700-200 =500 |
(5)原式= 468-68-(62+38) = 400-100 =300 |
(6)原式=210+(115+523)-438 =210+638-438 = 410 |
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