-3又1/4加负2又3/4等于多少加多少等于47?


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展开全部3/4-2/15+1/3=45/60-8/60+20/60=52/60=13/15所以,可以通过计算得到答案13/15。已赞过已踩过你对这个回答的评价是?评论
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展开全部如图:展开全部3/4-2/15+1/3=45/60-8/60+20/60=57/60
展开全部3/4-2/15+1/3=45/60-8/60+20/60=57/60=19/20
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数学计算题要过程:(-1/4)+(-2/3)=? (7又1/2)+4=? (-2又4/7)+(-1又3/7)=? (-1/4)+(-2/3)=(-3/12)+(-8/12)=-3/12-8/12=-11/12(7又1/2)+4=15/2+4=15/2+8/2=23/2(-2又4/7)+(-1又3/7)=(-18/7)+(-10/7)=-18/7-10/7=-28/7=-4 数学计算题要过程:(-1/2)-(+2/3)=? (-16又1/5)-(-10又1/4)=? (-1/2)-2/3=-3/6-4/6=-7/6(-81/5)+41/4=-324/20+205/20=-116/20=-29/5望采纳,本人在线,可以追问 数学计算题:(-1)÷(-4又2/3)×(2又1/7)=? (-1)÷(-4又2/3)×(2又1/7)=+(1×14分之3×7分之15)=98分之45 数学计算题:(-1又1/4)×(-4/5)=? 1又2/3×(-1又1/5)=? (1)=-5/4乘-4/5=1(2)=5/3乘-6/5=-2 两道数学计算题!急~好的给20分!(1)-31又3/4×1又4/7+10又1/2×(-7又3/7)+(-20又1/4)×(-1又4/7) (1),把所有带分数化为假分数,即-127/4*11/7-21/2*52/7+81/4*11/7,这时可以发现有两项可以合并,化简之-45/4*11/7-21/2*52/7,接下来可以发现第二项中,分子和分母可约分,第一项只好死算-495/28-78,答案为-2679/282 化简,原式=-0.1+35/3+25/3=-0.1+20=19.9 数学计算:1/2×3/4+1/4×1/2+1/2=? 1/2×(1又3/4-2/7-1)=? 1/2×3/4+1/4×1/2+1/2=1/2×(3/4+1/4+1)=1/2×2=11/2×(1又3/4-2/7-1)=1/2×(7/4-2/7-1)=1/2×(3/4-2/7)=1/2×3/4-1/2×2/7=3/8-1/7=21/56-8/56=(21-8)/56=13/56 要过程 (-7又2/3)+(+4又1/2)-1/2= (- 7 又 2 / 3)+(+ 4 又 1 / 2)- 1 / 2= (- 7 + 4)+(- 2 / 3 + 1 / 2 - 1 / 2)= - 3 + (- 2 / 3)= - 3 又 2 / 3 【俊狼猎英】团队为你解答 数学计算题:-2.5÷(-5/6)÷-3的绝对值=? (-1)÷(-4又2/3)×(2又1/7)=? -5/8÷1/16 : -100.25÷(-1/5)÷(-1/64) : 80 -10-80=-90 (-7又2/3)+(+4又1/2)-1/2= 49又1/7+(-77.21+(-22.79)= 要过程 (-7又2/3)+(+4又1/2)-1/2= -23/3+4+1/2-1/2=-11/349又1/7+(-77.21+(-22.79)=49+1/7-(100)=-51+1/7=-50又6/7 数学计算题:(-1/2)×1/3=? 2/3×(-9/4)=?(-13.65)×(-2/3)=? (-1/2)×1/3=-1/62/3×(-9/4)=-3/2(-13.65)×(-2/3)=13.65×2÷3=27.3÷3=9.1

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展开全部3又1/2×7又3/4+7/2×1/4+1992=7/2×7又3/4+7/2×1/4+1992=7/2×(7又3/4+1/4)+1992=7/2×8+1992=28+1992=2020
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