(63+21×103)÷53.
下面各题,能简算的要用简便方法计算.3.9+0.56+6.1+0.4450÷2.5+1.8×4.56.87×[40÷(3.49﹣3.09)]0.8×(12.5+0.125)
能用简便算法的就用简便算法19.8+86.43+20.2 85×101﹣8515.52﹣1.6×5﹣5.7 [10.5﹣(5.6+3.2)]÷6.8.
脱式计算.1.6×(2.25+10.5÷1.5) 79÷0.25÷0.4 5.02﹣1.8+4.88 0.65×6.5﹣0.65×5.5 0.5×99+0.5 0.25×2.8×4.
计算下面各题,能简算的要简算.(1)9.86﹣3.4÷1.7×1.3 (2)0.36×3.9+3.9×1.64 (3)7.23﹣(2.8+1.23)(4)1.64×2.5+2.1÷0.6 (5)2.4×(0.85÷1.7)﹣1.08 (6)0.04×[(17.6﹣14.1)÷1.4].
脱式计算,能简算的要简算.2.65×1.7+1.35×1.7 23.4÷7.8﹣2.10.75×18÷0.15 2.5×3.2×1.25.