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

Toán Lớp 7: 1/3 x ( 2/7 + 3/11 ) + 1/3 x ( 5/7 – 1 3/11 ) . giúp em ạ

Toán Lớp 7: 1/3 x ( 2/7 + 3/11 ) + 1/3 x ( 5/7 – 1 3/11 ) .
giúp em ạ

Comments ( 2 )

  1. Xuu ????
    $\dfrac{1}{3}$ × ( $\dfrac{2}{7}$ + $\dfrac{3}{11}$ ) + $\dfrac{1}{3}$ × $\dfrac{5}{7}$ – $\text{1}$$\dfrac{3}{11}$ .
    = $\dfrac{1}{3}$ . $\dfrac{43}{77}$ + $\dfrac{1}{3}$ . ( $\dfrac{-43}{77}$ ) .
    = $\dfrac{1}{3}$ . ( $\dfrac{43}{77}$ + $\dfrac{-43}{77}$ ) .
    = $\dfrac{1}{3}$ . $\dfrac{0}{7}$ = $\dfrac{0}{27}$ = 0 .
    → Sr nãy h ngâm hơi lâu ^^  ( ik nhìu chiện ) .
    → Xin hay nhất cho người sao hỏa …

  2. Giải đáp + Lời giải và giải thích chi tiết:
     1/3. (2/7 + 3/11) + 1/3. (5/7 – 1 3/11)
    = 1/3. (2/7 + 3/11) + 1/3. (5/7 – 14/11)
    = 1/3. 43/77 + 1/3. (-43/77)
    = 1/3. (43/77 – 43/77)
    = 1/3. 0 = 0

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

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