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

Toán Lớp 6: 1) 5/9*(-27/10):18/7 2)1/4+5/8-(-7/12) 3)1/2-3/4+5/6+7/12 4)1,5*(4/3-2)-3/4 5)28/3.0,4-2/5*1/3+2/5 6)7/3+3/5:(-9/20)

Toán Lớp 6: 1) 5/9*(-27/10):18/7
2)1/4+5/8-(-7/12)
3)1/2-3/4+5/6+7/12
4)1,5*(4/3-2)-3/4
5)28/3.0,4-2/5*1/3+2/5
6)7/3+3/5:(-9/20)

Comments ( 1 )

  1. 1)
    5/9 . (-27/10) :18/7
    =(-3/2) . 7/18
    =-7/12
    2)
    1/4+5/8-(-7/12)
    =1/4+5/8+7/12
    =7/8+7/12
    =35/24
    3)
    1/2-3/4+5/6+7/12
    =(1/2+5/6)+(7/12-3/4)
    =4/3-1/6
    =8/6-1/6
    =7/6
    4)
    1,5 . (4/3-2)-3/4
    =1,5 . (-2/3)-3/4
    =(-1)-3/4
    =-7/4
    5)
    28/3 . 0,4-2/5 . 1/3+2/5
    =56/15-2/15+2/5
    =4
    6)
    7/3+3/5:(-9/20)
    =7/3-4/3
    =3/3=1
     

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

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