Toán Lớp 5: a,1752:Xx69=10074 b,75:X+125:X=40 c,x+1/3/1/3=13 2/3

Question

Toán Lớp 5:  a,1752:Xx69=10074 b,75:X+125:X=40 c,x+1/3/1/3=13       2/3

quynhthanhnghi · Answer

a)1752:x xx 69=10074

1752 : x=10074:69
1752: x=146
x=1752:146
x=12

b)75: x+125: x=40

125 : x + 75 : x = 5
(125 + 75) : x = 5

200 : x = 5
x = 200 : 5
x = 40

c)x+(2/3)/(1/3)=13 2/3
x+(2/3)/(1/3)=41/3
x=41/3-(2/3)/(1/3)
x=35/3

thuminhthong · Answer

Giải đáp+Lời giải và giải thích chi tiết:    a)1752:X x 69=10074   &hArr;1752 :  X=10074:69 &hArr;1752: X=146 &hArr;X=1752:146  &rArr;X=12     b,75: X+125: X=40    &hArr;125 : x + 75 : x = 5 &hArr;(125 + 75) : x = 5   &hArr;200 : x = 5 &hArr;x = 200 : 5  &rArr;x = 40      c,x+$ frac{ frac{1}{3} }{ frac{1}{3}}$ =13$ frac{2}{3}$           &hArr;x  +$ frac{ frac{1}{3} }{ frac{1}{3}}$     =$ frac{13 &times;3+2}{3}$         ​                   &hArr;x  +$ frac{ frac{1}{3} }{ frac{1}{3}}$    =$ frac{39+2}{3}$         ​                   &hArr;x  +$ frac{ frac{1}{3} }{ frac{1}{3}}$            ​    ​    ​      =$ frac{41}{3}$         ​                   &hArr;x  + $ frac{1}{3&times;3}$      =$ frac{41}{3}$         ​                   &hArr;x  + $ frac{1}{9}$          ​      =$ frac{41}{3}$         ​                   &hArr;x  =$ frac{41}{3}$ - $ frac{1}{9}$       ​                     &rArr;x  = $ frac{122}{9}$       ​