
6.5+2.7×1.4-5.63的简便方法?
2个回答
展开全部
6.5+2.7×1.4-5.63
=6.5+2.7×2×0.7-5.63
=6.5+5.4×0.7-5.63
=6.5+3.78-5.63
=10.28-5.63
=4.65
=6.5+2.7×2×0.7-5.63
=6.5+5.4×0.7-5.63
=6.5+3.78-5.63
=10.28-5.63
=4.65
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