数学简便运算:4/13×2+1/13×6+2/13×6

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数学简便运算:4/13×2+1/13×6+2/13×6

数学简便运算:4/13×2+1/13×6+2/13×6
数学简便运算:4/13×2+1/13×6+2/13×6

数学简便运算:4/13×2+1/13×6+2/13×6
提取1/13后得
(4*2+1*6+2*6)/13=26/13=2

2

4/13×2+1/13×6+2/13×6 =4×3/13×6×3+1/13×6+2/13×6=(12+1+2)/13×6=13/13×6=1/6