计算并验算.3354÷78=4.5×5.03=
递等式计算,能巧算的要巧算472+239+661 8324﹣813﹣187 7218÷9×7 320×8÷5.
请你连一连.
计算下面各题,能简算的请用简便方法计算.8.38+9.43+6.62 5.86﹣1.77+2.54 47.2+8.6﹣7.2 28.6﹣3.8﹣14.6﹣6.2 8﹣2.6﹣1.77 7.4+0.93﹣4.3617.34﹣(9.8+6.34) 0.93+5.45+7.07+4.55.
计算下面各题.13.4×5.6×2.5 6.75×0.12+15.73 3.25×7.4﹣8.51 8.7×3.3﹣15.2×2.6 45.2﹣14.36+17.6 9.43×61+24.77.
7.6+3.9÷0.3(14.7+5.6)÷762.7÷8÷1.254.6÷0.08﹣20.8.