用递等式计算,能简便计算的要简便计算.
0.034×0.5×0.6
50.4×1.9﹣1.8
25.8+3.76×0.25
102×0.45.
用递等式计算,能简便计算的要简便计算.
0.034×12.5×0.8 100.4×1.9﹣1.9×0.4
25.8+3.76×0.25101×0.45.
脱式计算
4.8+4.2÷60 279+141+12125×23×4
102×88﹣2×88(40+4)×2513.75﹣5.28﹣4.72.
递等式计算(能简算的要简算)
4.65﹣2.55﹣1.456.4÷(0.3×2+0.2)201×6.5﹣6.52.2×0.25+2.8×0.25.
计算下面各题,能简算的要简算.
(1)(6.8﹣5.4)×2.75﹣0.9
(2)3.8×5.6+4.4×3.8
(3)1.24×8.3+8.3×1.76
(4)88×0.25×9.