108×64= 38×46= 270×28= 25×324= 209×70= 280×60=
计算下面各题,能简便的要简便计算. 16.2﹣4.65+5.356000÷12513.7﹣6.38+6.3﹣4.32 (45+405÷27)×120 125×250×32333×444+666×778.
简便运算. (1)0.54×40.5﹣0.44×40.5= (2)1.4×2.5×40= .
计算. ①7.5×1.8÷0.15 ②12.4÷0.8﹣9.64 ③7.65×2.4+1.64 ④12.3﹣10.8÷4.5 ⑤44.28÷4.1÷0.9+2.5 ⑥39.87×4.58﹣29.87×4.58.
计算下面各题.(能简算的用简便算法) ①12.36﹣6.49﹣3.51 ②8.5×3.8+8.5×6.2 ③0.2÷2.5×(4.2﹣1.075) ④[3.2﹣3.2×(30.4﹣29.85)]÷1.8.
下面各题怎样算简便就怎样算: ①3.6×1.25+0.32÷0.4②455﹣12.5×4÷8.1 ③8.25×4.8+4.8×1.75