Question

4.7×13+1.3÷3的简便运算怎么做？

Answer 1

同时提取13，得13*[4.7+(1/10)*(1/3)]=13*[47/10+1/30]=13*(142/30)=(13*71)/15=923/15≈61.53(3循环)

Answer 2

=47*1.3+1.3*1/3
=1.3*(47+1/3)
=1.3*142/3
=923/3