口算.3.7+0.63= 3.2×= 8﹣= 2.5×6.7×4=75×99= 81÷= += ×(8+5)×=
用简便方法计算.①4.45+0.63+5.55 ②45.5﹣(0.98+5.5) ③0.96﹣0.28+0.04﹣0.72.
直接写得数:1.25×8= 5×2.4= 0.36÷3.6= 5.6+4.04= 4.6×0.1=72.5÷0.01= 0.8×0.05= 6.04﹣0.4=1÷4= 48.9﹣(8.9+4.96)= 27.5×11÷27.5×4=
递等式计算(3.2+4.06)÷6.05 26.8﹣1.2×4 3.5×3+3.5×70 4×(3.2﹣0.8)÷1.2.
脱式计算.(能简算的要简算)6.8×0.75÷0.5 13.5÷2.5﹣2.75 0.125×0.25×32 0.9+9.9+99.9+0.3.
用自己喜欢的方法计算下面各题.1.28+0.86+38.72 0.45÷0.6÷0.5 32×0.25×1.250.78÷0.13×0.2 13.6×9+40.6÷2 1.08×0.8÷0.27.