4.7*3.56+2.5*3.56+6.44*7.2(简便运算)

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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(简便运算)4.7*3.56+2.5*3.56+6.44*7.2(简便运算)4.7*

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(简便运算)

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