0.67×0.99+0.67几简便运算?
2个回答
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0.67×0.99+0.67
=0.67×(0.99+1)
=0.67×1.99
=0.67×(2-0.01)
=0.67×2-0.67×0.01
=1.3333
=0.67×(0.99+1)
=0.67×1.99
=0.67×(2-0.01)
=0.67×2-0.67×0.01
=1.3333
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