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2/51×35分之4×7/4等于多少用分数表示

51又3分之2×5分之2-7分之4 =(51+2/3)x2/5-4/7 =(50+1+2/3)x2/5-4/7 =20+2/5+4/15-4/7 =20+6/15+4/15-4/7 =20+2/3-4/7 =20+14/21-12/21 =20+2/21 =420/21+2/21 =422/21

51又2/3×3/5+71又3/4×4/7+91又4/5×5/9 =(50+5/3)×3/5+(70+7/4)×4/7+(90+9/5)×5/9 =30+1+40+1+50+1 =123

51人3分之2是34人 计算如下 51人×2/3 =17×2人 =34人

5/17-51/4+2/3等于多少分之几 5/17-51/4+2/3 =60/204-2601/204+136/204 =-2405/204

5分之3×9分之4+5分之3×9分之53/5×(4/9+5/9)=3/57分之2×5分之2+7分之6×5分之1=4/7×1/5+6/7×1/5=(4/7+6/7)×1/5=10/7×1/5=2/7

2/3≈0.67 4/5=0.8 1/7≈0.14 4/5最接近1

5/17-4/51+2/3 =15/51-4/51+2/3 =11/51+2/3 =11/51+34/51 =45/51 =15/17 望采纳

数学题简便计算 51又2/3÷1又2/3+71又3/4÷1又3/4 =(50+5/3)×3/5+(70+7/4)×4/7 =50×3/5+5/3×3/5+70×4/7+7/4×4/7 =30+1+40+1 =72

4×2/11+4×2/5+2×1/51+7×2/11 =(4×2/11+7×2/11)+4×2/5+2×1/51 =(4+7)×2/11+(8/5+2/51) =11×2/11+(1+153/255+10/255) =2+1+163/255 =3又163/255

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