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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 4: rút gọn các phân số sau : 1212/3030 ; 32032/48048 ; 456456/234234 ; 1339/1442.viết bước trung gian hộ mình nhe.cảm ơn nhìu (^-^)

Toán Lớp 4: rút gọn các phân số sau : 1212/3030 ; 32032/48048 ; 456456/234234 ; 1339/1442.viết bước trung gian hộ mình nhe.cảm ơn nhìu (^-^)

Comments ( 2 )

  1. $\dfrac{1212}{3030}$=$\dfrac{1212 : 606}{3030 : 606}$=$\dfrac{2}{5}$
    $\dfrac{32032}{48048}$=$\dfrac{32032 : 16016}{48048 : 16016}$=$\dfrac{2}{3}$
    $\dfrac{456456}{234234}$=$\dfrac{456456 : 6006}{234234 : 6006 }$=$\dfrac{76}{39}$
    $\dfrac{1339}{1442}$=$\dfrac{1339 : 103}{1442 : 103}$=$\dfrac{13}{14}$

  2. #laviken#
    1212/3030=(1212:6)/(3030:6)=202/505=2/5
    ———–
    32032/48048=(32032:16016)/(48048:16016)=2/3
    ———–
    456456/234234=(456456:6006)/(234234:6006)=76/39
    ———–
    1339/1442=(1339:103)/(1442:103)=13/14
     

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222-9+11+12:2*14+14 = ? ( )