计算,能简算的要简算.
(4﹣7.5×)÷ 0.25÷+0.25× 2.8×+1.2÷
45÷[72×()] 7.2+[(7.8+)÷0.4] .
下面各题,怎样简便就怎样算.
(0.86+0.86+0.86+0.86)×25 0.2+(3.4+)×
7.6×÷[1.9﹣1.9×(1.9﹣1.9)] 74×19+19×25.4.
下面各题,怎样简便就怎样算.
(1)(+﹣)×12
(2)38﹣15.38+61.25﹣4.62
(3)0.91÷+1.25×1.09
(4)÷[+×(1﹣)].
试题篮
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