3、用简便方法计算下面各题.(16分) 3.8×6.7+3.3×3.8 1.28×0.29-0.29×0.28 101×4.8 56×12.5

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3、用简便方法计算下面各题.(16分)3.8×6.7+3.3×3.81.28×0.29-0.29×0.28101×4.856×12.53、用简便方法计算下面各题.(16分)3.8×6.7+3.3×3.

3、用简便方法计算下面各题.(16分) 3.8×6.7+3.3×3.8 1.28×0.29-0.29×0.28 101×4.8 56×12.5
3、用简便方法计算下面各题.(16分) 3.8×6.7+3.3×3.8 1.28×0.29-0.29×0.28 101×4.8 56×12.5

3、用简便方法计算下面各题.(16分) 3.8×6.7+3.3×3.8 1.28×0.29-0.29×0.28 101×4.8 56×12.5
3、用简便方法计算下面各题.(16分)
3.8×6.7+3.3×3.8
=3.8×(6.7+3.3)
=3.8×10
=38
1.28×0.29-0.29×0.28
=0.29×(1.28-0.28)
=0.29×1
=0.29
101×4.8
=100×4.8+4.8
=480+4.8
=484.8
56×12.5
=7×(8×12.5)
=7×100
=700