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

Toán Lớp 7: 5/12-(-3/4)+7/12×(-3/4) Giúp part 2

Toán Lớp 7: 5/12-(-3/4)+7/12×(-3/4)
Giúp part 2

Comments ( 2 )

  1. 5/12 – (-3/4) + 7/12 . (-3/4)
    = 5/12 +3/4 + 7/12 . {-3}/4
    = 5/12 + 9/12 – 7/16
    = 7/6 – 7/16
    =35/48 

  2. 5/12 – (-3/4) + 7/12 xx (-3/4)
    = 5/12 + 3/4 + (-7/16)
    = 20/48 + 36/48 – 21/48
    = \frac{20 + 36- 21}{48}
    =35/48

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