8.88*1.25+2.5*4.44的简便运算

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8.88*1.25+2.5*4.44的简便运算
8.88*1.25+2.5*4.44的简便运算

8.88*1.25+2.5*4.44的简便运算
原式=8*1.11*1.25+4*1.11*2.5
=22.2
把8.88 4.44拆成共有的因数1.11*8 和1.11*4
然后使用分配律就会发现可以相乘得整数

=1.11*(8*1.25)+(2.5*4)*1.11=1.11*10+10*1.11=11.1+11.1=22.2

=8*1.11*1.25+4*1.11*2.5
=1.11*10+1.11*10
=22.2

8.88*1.25+2.5*4.44
=2*4.44*1.25+2.5*4.44
=2.5*4.44+2.5*4.44
=2*2.5*4.44
=5*2*2.22
=10*2.22
=22.2

=8*1.11*1.25+4*1.11*2.5
=1.11*10+1.11*10
=22.2