37×1/4+18×0.25+45×25%2/15÷1又1/4+80%×2/15尽快
37×1/4+18×0.25+45×25%
2/15÷1又1/4+80%×2/15
尽快
这么简单的数学题,还偷懒 啊。。。
⒈=37×0.25+18×0.25+45×0.25
=(37+18+45)×0.25
=100×0.25
=25
第二个你确定没抄错题目?
第一题可以把1/4提出来
第二题同样
37×1/4+18×0.25+45×25%
=37×0.25+18×0.25+45×0.25
=0.25×(37+18+45)
=0.25×100
=25
2/15÷1又1/4+80%×2/15
=2/15÷5/4+4/5×2/15
=2/15×4/5+4/5×2/15
=2/15×4/5×2
=16/75
(37+18+45)÷4+2/15×4/5×2=25+16/75
1.解答是 : 四分之一=0.25=25% 提取因式 :(37+18+45)*0.25=252
37×1/4+18×0.25+45×25%= ( 37 +18 +45 )* 1/4
= 100*1/4
= 25
37×1/4+18×0.25+45×25%
=(37+18+45)x0.25
=100x0.25
=25
2/15÷1又1/4+80%×2/15
=2/15x(4/5+0.8)
=2/15x4/5X2
=16/75
不理解就追问,理解了请采纳!
❶37*1\4+18*0.25+45*25%
=4\1*(37+18+45)
=25
❷2\15除以1又4分之1+80%*2\15
=(2\15除以2\15)+1又1\4*80%
=1+1
=2
祝你学习进步!