脱式计算,能简算的要简算。
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| (1)原式=0.25×4×4.78 =1×4.78 = 4.78 |
(2)原式=1.5×(100+5) =150+7.5 =157.5 |
| (3)原式=2.07×2.8 =5.796 |
(4)原式=2.3+3.91÷2.3 =2.3+1.7 = 4 |
| (5)原式=(2.65+1.35)×1.7 = 4×1.7 =6.8 |
(6)原式=0.01032+0.875 =0.88532 |
| (7)原式=0.5×2×(1.25×0.8) =1×1 =1 |
(8)原式=(10-1.35)×1.2-0.9 =10.38-0.9 =9.48 |
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