题目内容
| 脱式计算,能简算的要简算。 | ||||||
|
| (1)60÷15+2.5×1.9 =4+4.75 =8.75 |
(2) = = = |
| (3) =( =1+ =1 |
(4)0.65×8.7+6.5×0.23﹣0.65 =6.5×0.87+6.5×0.23﹣6.5×0.1 =6.5×(0.87+0.23﹣0.1) =6.5×1 =6.5 |
| (5) =0.9×24×25 =0.9×6×4×25 =(0.9×6)×(4×25) =5.4×100 =540 |
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