Question

1/3加2/3乘5/6加4/9怎么用简便算法计算?

Answer 1

1/3加2/3乘5/6加4/9
= 1/3 + 2/3 x 5/6 + 4/9
= 1/3 + 1/3 x 5/3 + 1/3 x 4/3
= 1/3 x ( 1+ 5/3+4/3 )
= 1/3 x 12/3
= 3分之4