直接写出得数.= = == = =
计算(1)0.625×4+3÷0.4 (2)4×3.09×0.25 (3)(27.5×0.75﹣3.405)÷0.8(4)4.02÷[(1﹣0.4)÷0.1] (5)(50﹣20×0.1)÷0.01 (6)18.75﹣0.43﹣4.57.
脱式计算.(能简算的要简算)28.76﹣4.37﹣5.6358×0.37+0.37×428.27﹣5.84+1.73﹣2.16516÷(36×11﹣353)
计算,能简便的要简便算.31.9×18﹣8×31.9 21÷(+)÷ ×14+ 7.8÷[32×(1﹣)+3.6].
混合运算.(写出计算过程)28.7﹣14.7÷1.4 0.25×4.56×40 (1.7+3.3÷5)×0.20.45+0.15×997 12×0.25+8.8×2.5 (3﹣1.6)÷2.5×0.1.
计算下面各题,能简算的要简算.①4.28﹣1.39﹣2.61 ②7.2×0.3+0.3×0.8 ③0.4×3.14×2.5 ④9.4×[3.6÷(5.4÷0.9)]⑤840÷(0.23+0.37)÷7 ⑥23.7╳1.25╳8 ⑦12.5×102 ⑧9.1+0.9╳(22﹣18.7)