计算,能简算的要简算7.26+3.2÷2.5 14.6﹣4.6×2.8 0.8+0.8+…+0.8+15×0.2 15个0.814.5×102 4.05÷0.5﹣1.14 9.99×99+9.99.
怎样简便就怎样 18 2.42÷+4.58×﹣4÷3.
①② ③0.25×32×0.125④.
下面各题,怎样算简便就怎样算: (1)12×(+﹣)(2)48×(3)3.7×+5.3×0.75+(4)9.9+99.9+999.9.
用简便方法计算 ①(﹣+)÷ ②74×+2.6×3.6.
计算:46×.