4.7*3.56+2.5*3.56+6.44*7.2(简便运算)

问题描述:

4.7*3.56+2.5*3.56+6.44*7.2(简便运算)

4.7*3.56+2.5*3.56+6.44*7.2
=(4.7+2.5)*3.56+6.44*7.2
=7.2*3.56+6.44*7.2
=7.2*(3.56+6.44)
=7.2*10
=72