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计算:(0.25+2/5)/(2.75-1又2/3)/2又1/6简便运算:1.0.9+0.99+0.999+0.1114.3.34*3.33*2.22*9.995.71.2*1.25+0.712*875
题目详情
计算:(0.25+2/5)/【(2.75-1又2/3)/2又1/6】 简便运算:1.0.9+0.99+0.999+0.111
4.3.34*3.33*2.22*9.99
5.71.2*1.25+0.712*875
4.3.34*3.33*2.22*9.99
5.71.2*1.25+0.712*875
▼优质解答
答案和解析
1.(0.25+2/5)/【(2.75-1又2/3)/2又1/6】
=0.65/【13/12×6/13】
=0.65/0.5
=1.3
2.0.9+0.99+0.999+0.111
=1+1+1-0.111+0.111
=3
4.3.34*3.33+2.22*9.99
=3.34*3.33+6.66*3.33
=(3.34+6.66)*3.33
=10*3.33
=33.3
5.71.2*1.25+0.712*875
=71.2*1.25+7.12*8.75
=71.2*(1.25+8.75)
=71.2*10
=712
=0.65/【13/12×6/13】
=0.65/0.5
=1.3
2.0.9+0.99+0.999+0.111
=1+1+1-0.111+0.111
=3
4.3.34*3.33+2.22*9.99
=3.34*3.33+6.66*3.33
=(3.34+6.66)*3.33
=10*3.33
=33.3
5.71.2*1.25+0.712*875
=71.2*1.25+7.12*8.75
=71.2*(1.25+8.75)
=71.2*10
=712
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