Question

19分之16乘以11分之2加11分之2乘以19分之3简便计算怎么算?

Answer 1

(16/19)*(2/11)+(2/11)*(3/19)

提取公因式2/11

原式

=(2/11)(16/19+3/19)

=(2/11)(19/19)

=(2/11)*1

=2/11