题目内容
| 用递等式计算,能简便计算的要用简便方法计算。 | ||||||
|
| (1) = = = |
(2)4.89×6.3+48.9×0.37 =4.89×6.3+4.89×3.7 =4.89×(6.3+3.7) =48.9 |
| (3) = = = |
(4) =(2.5×0.4)× =1×1 =1 |
| (5)158-92+42-8 =(158+42)-(92+8) =200-100 =100 |
(6)83.2÷(83.2÷11) =83.2÷83.2×11 =1×11 =11 |
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