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如何巧算?谢谢!
展开全部
(126 + 126 x6 + 126) x 125
= [126 x (1 + 6 + 1)] x 125
= 126 x 8 x 125
= 126 x (8 x 125)
= 126 x 1000
= 126000
= [126 x (1 + 6 + 1)] x 125
= 126 x 8 x 125
= 126 x (8 x 125)
= 126 x 1000
= 126000
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