简算简算!!!!!!
一、64.83+5又18/19+35.17+44又1/19二、34又3/4-(2又3/19-15.25)三、2又1/2×5又7/11×12.5×0.032四、75×0.4...
一、64.83+5又18/19+35.17+44又1/19 二、34又3/4-(2又3/19-15.25) 三、2又1/2×5又7/11×12.5×0.032 四、75×0.4+0.68×3/7-1/5×75+4/7×0.68 五、7/9×(48.5÷5/18-3.6+6.15×3又3/5 六、0.38×7又3/5+0.038÷0.25+38×0.02 七、(9又2/7+7又2/9)÷(5/7+5/9) 八、91×17/18 九、41又1/3×3/4+51又1/4×4/5+61又1/5×5/6 十、536÷536又536/537
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2个回答
2014-03-01
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一、64.83+5又18/19+35.17+44又1/19
=(64.83+35.17)+(44又1/19+5又18/19)
=100+49=149
二、34又3/4-(2又3/19-15.25)
=34又3/4-2又3/19+15又1/4
=49-2又3/19
=47又16/19
三、2又1/2×5又7/11×12.5×0.032
=(2又1/2×12.5×0.032)×5又7/11
=(5/2×25/2×4/125)×5又7/11
=5又7/11
四、75×0.4+0.68×3/7-1/5×75+4/7×0.68
==0.68*(3/7+4/7)+75*(0.4-0.2)
=0.68+15
=15.68
五、7/9×(48.5÷5/18-3.6+6.15×3又3/5)
=7/9×(48.5÷5/18-3.6+6.15×18/5)
=(7/9)*(18/5)*(48.5-1+6.15)
=150.22
六、0.38×7又3/5+0.038÷0.25+38×0.02
=0.38×38/5+0.038÷0.25+38×0.02
=0.38*(38/5+2/5+2)
=3.8
七、(9又2/7+7又2/9)÷(5/7+5/9)
=(65/7+65/9)+(5/7+5/9)
=(65+5)/7+(65+5)/9
=17又7/9
八、91×17/18= (似乎不能化简,答案为85.9444..)- -
九、41又1/3×3/4+51又1/4×4/5+61又1/5×5/6
=124/3×3/4+205/4×4/5+306×5/6
=124/3×3/4+205/4×4/5+306×5/6
=31+41+51*5
=327
十、536÷536又536/537
=536*1/(536*537+536)
=1/538
懂了吗?
=(64.83+35.17)+(44又1/19+5又18/19)
=100+49=149
二、34又3/4-(2又3/19-15.25)
=34又3/4-2又3/19+15又1/4
=49-2又3/19
=47又16/19
三、2又1/2×5又7/11×12.5×0.032
=(2又1/2×12.5×0.032)×5又7/11
=(5/2×25/2×4/125)×5又7/11
=5又7/11
四、75×0.4+0.68×3/7-1/5×75+4/7×0.68
==0.68*(3/7+4/7)+75*(0.4-0.2)
=0.68+15
=15.68
五、7/9×(48.5÷5/18-3.6+6.15×3又3/5)
=7/9×(48.5÷5/18-3.6+6.15×18/5)
=(7/9)*(18/5)*(48.5-1+6.15)
=150.22
六、0.38×7又3/5+0.038÷0.25+38×0.02
=0.38×38/5+0.038÷0.25+38×0.02
=0.38*(38/5+2/5+2)
=3.8
七、(9又2/7+7又2/9)÷(5/7+5/9)
=(65/7+65/9)+(5/7+5/9)
=(65+5)/7+(65+5)/9
=17又7/9
八、91×17/18= (似乎不能化简,答案为85.9444..)- -
九、41又1/3×3/4+51又1/4×4/5+61又1/5×5/6
=124/3×3/4+205/4×4/5+306×5/6
=124/3×3/4+205/4×4/5+306×5/6
=31+41+51*5
=327
十、536÷536又536/537
=536*1/(536*537+536)
=1/538
懂了吗?
2014-03-01
展开全部
0.76×2.8+0.75×7.2 =0.75*2.8+0.75*7.2+0.01*2.8=0.75*(2.8+7.2)+0.028=7.528999�0�5+999=999*999+999=999*(999+1)=9990005分之3×6分之1 =1/10(10分之1加4分之1)×4=1/10 *4 +1/4 *4 =2/5+1=1又2/5 你这分明都是小学奥数举一反三里面的题 。建议你去报个班学一下。这都很简单。注意的是,你要学会举一反三,不能就题作题,应该明白其实质
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