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

Toán Lớp 5: a,5/6+7/8= b,5/8_2/5= c, 9/10nhân 5/6= d,6/5:3/7= giả từng bước giúp em nhé

Toán Lớp 5: a,5/6+7/8= b,5/8_2/5= c, 9/10nhân 5/6= d,6/5:3/7= giả từng bước giúp em nhé

Comments ( 2 )

  1. Giải đáp:
    a,5/6+7/8=40/48+42/48=82/48=41/24
    b,5/8-2/5=25/40-16/40=9/40
    c,9/10×5/6=9×5/10×6=45/60=3/4
    d,6/5:3/7=6/5×7/3=6×7/5×3=42/15=14/15
                Xin hay nhất

  2. a)5/6+7/8
    =20/24+21/24
    =41/24
    b)5/8-2/5
    =25/40-16/40
    =9/40
    c)9/10xx5/6
    =\frac{9xx5}{10xx6}
    =\frac{3xx3xx5}{2xx5xx3xx2}
    =\frac{3}{2xx2}
    =3/4
    d)6/5:3/7
    =6/5 xx 7/3
    =14/5
     

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

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