下面各题,怎样算简便就怎样算.①1080+270÷18﹣864 ②7.54++2.46+ ③(2.4﹣)÷0.625+④2.5×12.5×40×0.8 ⑤98.9×99+98.9 ⑥40.5÷×[(1﹣)×1.2].
脱式计算 (能简算的要简算). 72.8÷5.6+1.4958.1﹣29.7÷330.94﹣5.09﹣4.91 3.94+34.3×0.25.4×2.3+5.4×7.73.2×12.5×0.25.
计算下面各题,怎样简便怎样计算 6.89+4.7+2.11+5.3125×25﹣125×177.46﹣2.37﹣1.63 14﹣(3.65+0.24)6400÷25÷4(275﹣35)÷(17+43)
〔0.5+(2﹣0.75)〕×1.610.73﹣4.76﹣5.24 17.4×2.43﹣1.43×7.42.2+(4.72﹣2.8)÷0.4.
用递等式计算. 1.56﹣0.45+0.553.9+0.56+6.1+0.443.2+9.6÷0.32 3.12+3.12×991.25×3.2×254.75×[60÷(3.24﹣3.04)].
用你喜欢的方法递等式计算 1.76×6.5﹣1.76×5.570﹣29.6﹣10.4 0.175÷2.5÷0.4(20﹣1.4÷2)×0.4.