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

Toán Lớp 5: 2-( 7/9 + 5/6) =? 3/4+ 1/4: 3/4 =? Ai giúp mik vs

Toán Lớp 5: 2-( 7/9 + 5/6) =?
3/4+ 1/4: 3/4 =?
Ai giúp mik vs

Comments ( 2 )

  1. 2 – ( 7/9 + 5/6 )
    = 2 – ( 14/18 + 15/18 )
    = 2 – ( { 14 + 15 }/18 )
    = 2 – 29/18
    = 36/18 – 29/18
    = { 36 – 29 }/18
    = 7/18
    3/4 + 1/4 : 3/4
    = 3/4 + 1/4 × 4/3
    = 3/4 + { 1 × 4 }/{ 4 × 3 }
    = 3/4 + 1/3
    = 9/12 + 4/12
    = { 9 + 4 }/12
    = 13/12

  2. 2 – ( 7/9 + 5/6 ) 
    = 2 – $(\dfrac{14}{18}$ + $\dfrac{15}{18})$ 
    = 2 – $\dfrac{29}{18}$ 
    = $\dfrac{36}{18}$ – $\dfrac{29}{18}$ 
    = $\dfrac{36-29}{18}$ 
    = $\dfrac{7}{18}$ 
    ——————————————————————–
    3/4 + 1/4 : 3/4
    = 3/4 + 1/4 × 4/3
    = 3/4 + 1/3
    = $\dfrac{9}{12}$ + 4/12
    = $\dfrac{9+4}{12}$ 
    = $\dfrac{13}{12}$ 

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