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

Toán Lớp 7: Tính nhanh: $(-1/4+7/33-5/3)-(-15/12+6/11-48/49)$

Tháng Một 11, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: Tính nhanh: $(-1/4+7/33-5/3)-(-15/12+6/11-48/49)$

Comments ( 2 )

  1. ngoclankhue
    ngoclankhue
    11 Tháng Một, 2023 at 10:37 sáng
    Reply
    (-1/4 + 7/33 – 5/3) – (-15/12 + 6/11 – 48/49)
    = -1/4 + 7/33 – 5/3 + 5/4 – 6/11 + 48/49
    = (-1/4 + 5/4) + (7/33 – 5/3 – 6/11) + 48/49
    = ( \frac{-1+5}{4}) + ( 7/33 – 55/33 – 18/33) + 48/49
    = 1 + (-2) + 48/49
    = -1 + 48/49
    = -49/49 + 48/49
    = -1/49

  2. truongankimtrong
    truongankimtrong
    11 Tháng Một, 2023 at 10:37 sáng
    Reply
    (-1/4+7/33-5/3)-(-15/12+6/11-48/49)
    =frac\{-1}{4}+7/33+frac\{-5}{3}+5/4+frac\{-6}{11}+48/49
    =(frac\{-1}{4}+5/4)-(5/3+6/11+frac\{-7}{33})+48/49
    =1-2+48/49
    =-1/49

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

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