计算.(能简算的要用简便方法计算)
(1)÷6+× (2)12×(1﹣÷)
(3)(×+)÷ (4)×[﹣(﹣)]
(5)10﹣(39÷+) (6)2﹣(+)×.
能简算的用简便方法计算.
(﹣÷2)× ﹣(+)× ×99+
(1﹣75%)÷(1+) 204÷+204×9. 2.7÷(1﹣20%﹣18%)
合理计算
8.6×10.1 78.1﹣7.7÷0.7×5.2 〔(8.1﹣5.6)×0.9﹣1〕×0.4
8.25×4.08+0.75×4.08+4.08 1.25×32×2.5 8.1÷2+1.9÷2.
直接写得数
12.7﹣(8.65+2.7) 92.5×0.25×4 6.7×0.9+6.7×0.1
8.25×9.9+0.825 3.4×8.7+34×0.13 6.5×1.1
简便计算
12.5×(0.7×0.8) 6.25×1.02 1.25×99
12.5×32×2.5 4.12﹣1.78﹣1.22 4.2÷0.7÷6.
0.46×7.5+0.46×2.5
3﹣7.14÷3.5×1.05
9.9×8.6+0.86
[20﹣(90.75÷6.6+2.25)]×11.6.
7.02×900×0.6
0.035÷0.7÷0.5
13.6﹣13.6×0.7
5.62+3.1×0.6+3.38
(25﹣1.25×5)÷2.5
8.1×0.3+1.8×0.3+0.03.
试题篮
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