脱式计算 (能用简便方法的简便计算)
①2.07÷2.5÷0.4 ②21.36÷0.8﹣12.9
③0.125×32×2.5 ④0.65×201
⑤1.2×2.5+8×0.25 ⑥50.4×19+50.4.
脱式计算 (能用简便方法的简便计算)
①2.07÷2.5÷0.4 ②21.36÷0.8﹣12.9
③0.125×32×2.5 ④0.65×201
⑤1.2×2.5+8×0.25 ⑥50.4×19+50.4.