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

Toán Lớp 4: Cộng hai phân số cùng mẫu số: a/ 3/7+5/8 b/ 7/6+3/4 c/ 1+4/5 d/ 5/9+2

Toán Lớp 4: Cộng hai phân số cùng mẫu số: a/ 3/7+5/8 b/ 7/6+3/4 c/ 1+4/5 d/ 5/9+2

Comments ( 2 )

  1. a) 3/7+5/8=24/56+35/56=(24+35)/56=59/56
    b) 7/6+3/4=14/12+9/12=(14+9)/12=23/12
    c) 1+ 4/5=5/5+4/5=(5+4)/5=9/5
    d) 5/9 +2=5/9+18/9=(5+18)/9=23/9

  2. a ) 3/7 + 5/8 = 24/56 + 35/56 = 59/56
    b ) 7/6 + 3/4 = 14/12 + 9/12 = 23/12
    c ) 1 + 4/5 = 5/5 + 4/5 = 9/5
    d ) 5/9 + 2 = 5/9 + 18/9 = 23/9
    #dtkc

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