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

Toán Lớp 6: Thực hiện phép tính a)5/14+7/12 b)7/12-5/9

Toán Lớp 6: Thực hiện phép tính
a)5/14+7/12
b)7/12-5/9

Comments ( 2 )

  1. a) 5/14 + 7/12 = ( 30 + 49 )/84 = 79/84
    b) 7/12 – 5/9 = ( 21 – 20 )/36 = 1/36
    @Rin

  2. a)5/14+7/12
    =(5.6)/(14.6)+(7.7)/(12.7)
    =30/84+49/84
    =79/84
    b)7/12-5/9
    =(7.3)/(12.3)-(5.4)/(9.4)
    =21/36-20/36
    =1/36.

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