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2/51×35分之4×7/4等于多少用分数表示

2/51×4/35×7/4 =2/51x1/5 =2/255

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

51×3/34 =(3×17×3)/(2×17) =9/2

如图

5/17-51分之4 +2/3简便运算 =15/51-4/51+34/51 =11/51+34/51 =45/51 =15/17

解:依据题意有, (4/3)*(2/51)*(17/80) =(4/3)*(1/120) =(1/3)*(1/30) 1/90 答:3分之4乘51分之2乘80分之17等于1/90.

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

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

17/5+51/4+3/2 =(17*2*4+51*5*2+3*4*5)/(5*4*2) =706/40 =17.65

3/5=42/70 1/2=35/70 5/7=50/70 5/7>3/5>1/2

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