题目内容
| 计算下面各题(能简算的要简算)。 | ||||||
|
| (1)139+298 =140+300-1-2 =437 |
(2)7.45-2.83+2.55-2.17 =10-5 =5 |
| (3)1000-540÷18×2.4 =1000-72 =928 |
(4)24×( =7+20-15 =12 |
| (5) = = |
(6) = = |
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题目内容
| 计算下面各题(能简算的要简算)。 | ||||||
|
| (1)139+298 =140+300-1-2 =437 |
(2)7.45-2.83+2.55-2.17 =10-5 =5 |
| (3)1000-540÷18×2.4 =1000-72 =928 |
(4)24×( =7+20-15 =12 |
| (5) = = |
(6) = = |