计算题4道 简便运算 +-*/(加减乘除){分数}1. {1/15}/3.25+{8/13}*{4/15}+{4/13}/3.752.99.9*999+99.93.61*0.125*0.5*0.254.({1/2}+{1/3}+{1/4}+{1/6})*24

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计算题4道 简便运算 +-*/(加减乘除){分数}1. {1/15}/3.25+{8/13}*{4/15}+{4/13}/3.752.99.9*999+99.93.61*0.125*0.5*0.254.({1/2}+{1/3}+{1/4}+{1/6})*24
计算题4道 简便运算 +-*/(加减乘除){分数}
1. {1/15}/3.25+{8/13}*{4/15}+{4/13}/3.75
2.99.9*999+99.9
3.61*0.125*0.5*0.25
4.({1/2}+{1/3}+{1/4}+{1/6})*24

计算题4道 简便运算 +-*/(加减乘除){分数}1. {1/15}/3.25+{8/13}*{4/15}+{4/13}/3.752.99.9*999+99.93.61*0.125*0.5*0.254.({1/2}+{1/3}+{1/4}+{1/6})*24
1.=(1/15)/(13/4)+(8/13)*(4/15)+(4/13)/(15/4)
=(1/15)*(4/13)+(4/13)*(8/15)+(4/13)*(4/15)
=(1/15+8/15+4/15)*(4/13)
=(13/15)*(4/13)
=4/15
2.=99.9*(999+1)
=99.9*1000
=9990
3.=61*1/8*1/2*1/4
=61/64
4.=(24/2)+(24/3)+(24/4)+(24/6)
=12+8+6+4
=30