Question

4/27×4/21+1/7的和等于多少简算？

Answer 1

4/27*4/21+1/7=4/27*4/21+3/21=16/81*3/21+3/21=3/21*(16/81+1)=3/21*97/81=97/567,此为运算步骤

Answer 2

4/27×4/21+1/7
=1/7×（4/27×4/3+1）
=1/7×（16/81+1）
=1/7×97/81
=97/567