直接写出得数.1﹣= 4×= 10÷= 72÷36%=86%+1= 0.1÷1%= 4×2.5%= 4.5﹣75%﹣=
计算下面各题(能简算的要简算)1.25×3.2×2.5 1.8×5.6+44×0.18 3.4×99+3.4101×8.3﹣8.3 (27÷1.8﹣11)×2.5 39.4×[0.96÷(5.4÷0.9)].
简便运算.7.5+2.7+2.7+2.5+4.3 7.9﹣3.27﹣0.73+1.1 72×125(80+4)×125 67×88+67×11+67 203×15.
怎样简便怎样算:①8.35+3.8﹣2.35 ②15.4﹣(5.4+2.3) ③98×45④16×125×25 ⑤12×69﹣69×2 ⑥(20+8)×25.
用简便方法计算2011× +﹣+ (+)÷ 25%××4×.
口算题435+199= 16×0.2= 12= 4×25%= 2﹣2÷5= = = 5.5×1.6+1.6×4.5=