Question

怎么计算39*1/5+3/5*27教教

Answer 1

例：

1/5+2/5=(1+2)/5=3/5

39*1/5+3/5*27

=(3*13)/5+(3*27)/5

=(3*13+3*27)/5

=3*(13+27)/5

=3*40/5

=3*8

=24