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

Toán Lớp 7: 1) $\frac{13}{25}$ + $\frac{6}{41}$ – $\frac{38}{25}$ + $\frac{35}{41}$ -$\frac{1}{2}$ 2) 1$\frac{4}{23}$ – $\frac{5}{21}$ – $\frac{4}

Tháng Một 3, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: 1) $\frac{13}{25}$ + $\frac{6}{41}$ – $\frac{38}{25}$ + $\frac{35}{41}$ -$\frac{1}{2}$
2) 1$\frac{4}{23}$ – $\frac{5}{21}$ – $\frac{4}{23}$ + 0,5 – $\frac{16}{21}$

Comments ( 2 )

  1. maianhnhiquynh
    maianhnhiquynh
    3 Tháng Một, 2023 at 3:58 chiều
    Reply
    Giải đáp:
    $1.\ \dfrac{-1}2\\2.\ \dfrac12$
    Lời giải và giải thích chi tiết:
    $1.\\\dfrac{13}{25}+\dfrac6{41}-\dfrac{38}{25}+\dfrac{35}{41}-\dfrac12\\=\left(\dfrac{13}{25}-\dfrac{38}{25}\right)+\left(\dfrac{6}{41}+\dfrac{35}{41}\right)-\dfrac12\\=-1+1-\dfrac12\\=\dfrac{-1}2\\2.\\1\dfrac4{23}-\dfrac5{21}-\dfrac4{23}+0,5-\dfrac{16}{21}\\=\left(1\dfrac4{23}-\dfrac4{23}\right)+\left(\dfrac{-5}{21}+\dfrac{-16}{21}\right)+0,5\\=-1+1+\dfrac12\\=\dfrac12$

  2. dantam45
    dantam45
    3 Tháng Một, 2023 at 3:57 chiều
    Reply
    $1)$ $\frac{13}{25}+$ $\frac{6}{41}-$ $\frac{38}{25}+$ $\frac{35}{41}-$ $\frac{1}{2}$
    $=($ $\frac{13}{25}-$ $\frac{38}{25})+($ $\frac{6}{41}+$ $\frac{35}{41})+(-$ $\frac{1}{2})$
    $=(-1)+1+(-$ $\frac{1}{2})=-$ $\frac{1}{2}$
    $2)1$$\frac{4}{23}-$ $\frac{5}{21}-$ $\frac{4}{23}+0,5-$ $\frac{16}{21}$
    $=$ $\frac{27}{23}-$ $\frac{5}{21}-$ $\frac{4}{23}+\frac{1}{2}-$ $\frac{16}{21}$
    $=($ $\frac{27}{23}-$ $\frac{4}{23})+(-$ $\frac{5}{21}-$ $\frac{16}{21})+$ $\frac{1}{2}$
    $=1+(-1)+$ $\frac{1}{2}=$ $\frac{1}{2}$
     

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

Huyền Thanh

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