口算15÷0.251.5××1.82.5×0.432×2.5-优题课

口算
15÷0.25= 1.5×= ×1.8= 2.5×0.4= 32×2.5=
24×= 2.4+1.6= ÷= ×= ÷25%=

科目数学题型解答题难度中等

知识点：分数的四则混合运算

用简便方法计算．
+3.75++62.5%
×35%+×0.35
0.125×32×0.8
24×（+﹣）

简便计算
6.4+3.25+3.67.26﹣2.57﹣3.43101×2323×134﹣34×2399×62+62．

4.5×1.5+4.5×8.5．

用简便方法计算下面各题．
1.8×5.46+1.8×4.540.65×2012.33×0.5×4
99×5.64.8×0.252.64+8.67+1.33﹣1.64．

用简便方法计算．
①1.25×0.25×32②0.25×3.78×4③6.74×10.1④0.85×99 ⑤6.8×3.7+6.8×6.3．