陈静同学读一本书,前6天读30页,后4天读了80页,她平均每天读多少页?
计算下面各题,能简算的要简算0.87×4.5﹣4.5×0.67 3.18﹣(0.33+1.18)1.2+1.47÷0.7 1.76﹣[(0.74+0.26)÷0.8].
脱式计算,能简算得要简算.5.45+0.56×7.4 2.5×0.89×4 25×16.7﹣25×0.77.6×99 5.6×10.2 2.5×3.2×1.259.6÷0.4×0.25 3.56×2.8﹣1.24×0.9 (12.5+1.25)×8(2.5×1.7)×4 12.5×8.8 0.89×100.10.25×0.8×4×0.125 8.4×0.26+0.74 31.7﹣0.5×0.7﹣1.65.
用简便方法计算.8.37×7.2+8.37×2.812.5×3.9×0.81.3+2.9+8.7+0.19.6×10.1.
递等式计算(能简算的就简算).(1)3.37+12.89+2.63(2)513000÷125÷8(3)39×26+26×61(4)31.25﹣6.29﹣4.71(5)130×(300﹣125÷25)(6)2748÷[216÷(155﹣83)].
脱式计算(能简算的要简算)12.03﹣22.78÷3.4 4.78×99+4.78 2.5×6.9×428.8÷1.2×0.6 6.8+3.2÷2.5 8.6×3.3+2.7×8.6.