6.7+3.3×1.2的简便算法
3个回答
展开全部
=6.7×1.2+3.3×1.2-6.7×0.2
=1.2×(6.7+3.3)-1.34
=12-1.34
=10.66
=1.2×(6.7+3.3)-1.34
=12-1.34
=10.66
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展开全部
6.7+3.3*1.2
=6.6+0.1+6.6*0.6
=6.6*(1+0.6)+0.1
=6.6+6.6*0.6+0.1
=6.6+(3.96+0.1)
=6.6+4.06
=10.66
=6.6+0.1+6.6*0.6
=6.6*(1+0.6)+0.1
=6.6+6.6*0.6+0.1
=6.6+(3.96+0.1)
=6.6+4.06
=10.66
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