2.22×9.9+6.66×6.7,简便运算?
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这道题可以把9.9分解成3.3*3。7然后利用乘法结合律来简便运算:
2.22*9.9+6.66*6.7
=2.22*3*3.3+6.6*6.7
=6.66*3.3+6.66*6.7
=6.66*(3.3+6.7)
=6.66*10
=66.6
2.22*9.9+6.66*6.7
=2.22*3*3.3+6.6*6.7
=6.66*3.3+6.66*6.7
=6.66*(3.3+6.7)
=6.66*10
=66.6
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2.22×9.9+6.66×6.7
=2.22x3x3.3+6.66x6.7
=6.66x3.3+6.66x6.7
=6.66x(3.3+6.7)
=6.66x10
=66.6
=2.22x3x3.3+6.66x6.7
=6.66x3.3+6.66x6.7
=6.66x(3.3+6.7)
=6.66x10
=66.6
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根据题意,简便运算如下:
2.22*9.9+6.66*6.7
=2.22*3*3.3+6.66*6.7
=6.66*3.3+6.66*6.7
=6.66*(3.3+6.7)
=6.66*10
=66.6
2.22*9.9+6.66*6.7
=2.22*3*3.3+6.66*6.7
=6.66*3.3+6.66*6.7
=6.66*(3.3+6.7)
=6.66*10
=66.6
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