题目内容
脱式计算,能简算的要简算。
|
| (1)原式= = = = |
(2)原式=(4.6×0.2+0.4×0.2)×2.8 =(4.6+0.4)×0.2×2.8 =5×0.2×2.8 =2.8 |
| (3)原式= = = |
(4)原式= = =1 |
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题目内容
脱式计算,能简算的要简算。
|
| (1)原式= = = = |
(2)原式=(4.6×0.2+0.4×0.2)×2.8 =(4.6+0.4)×0.2×2.8 =5×0.2×2.8 =2.8 |
| (3)原式= = = |
(4)原式= = =1 |