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138x27除以69x50怎么巧算

138×27÷69×50 =138÷69×50×27 =2×50×27 =100×27 =2...

138x27÷69x50巧算 解: =(138÷69)(27x50) =2x50x27 =1...

37X27 =37X30-37X3 =1110-111 =1110-110-1 =999

巧算 (91x27x84x76)÷(9x7x19x13) =(91÷13)×(27÷9)×(84...

=(864×40-864×3)×27 =(34560-2592)×27 =31968×27 =319...

42x27+ 27x57+ 27怎么巧算 =27×(42+57+1) =27×100 =270...

运用乘法分配律 98×27 =(100-2)×27 =100×27-2×27 =2700-5...

=64×27+36×27+36 =(64+36)×27+36 =100×27+36 =2736

因为37乘以27是999,然后用简便方法。

拆括号(48/24)*(75/25)*(81/27)=2*3*3=18

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