36.7×2.1+7点九的简便运算？
2个回答
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36.7×2.1+7.9
=(35.7+1)x2.1+7.9
=35.7x2.1+1x2.1+7.9
=35.7x(2+0.1)+10
=35.7x2+35.7x0.1+10
=71.4+3.57+10
=74.97+10
=84.97。
=(35.7+1)x2.1+7.9
=35.7x2.1+1x2.1+7.9
=35.7x(2+0.1)+10
=35.7x2+35.7x0.1+10
=71.4+3.57+10
=74.97+10
=84.97。
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展开全部
36.7×2.1+7.9
=36.7×(2+0.1)+7.9
=36.7×2+36.7×0.1+7.9
=73.4+3.67+7.9
=77.07+7.9
=84.97
=36.7×(2+0.1)+7.9
=36.7×2+36.7×0.1+7.9
=73.4+3.67+7.9
=77.07+7.9
=84.97
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