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

Toán Lớp 4: Tính (theo mẫu) a) 1/2+1/3 2/5+3/2. 2/5+3/4

Toán Lớp 4: Tính (theo mẫu)
a) 1/2+1/3 2/5+3/2. 2/5+3/4

Comments ( 2 )

  1. @ ????????????????????????✨

    Bạn tham khảo ~

    Giải đáp + Lời giải và giải thích chi tiết :

    a) $\dfrac{1}{2}+\dfrac{1}{3}=\dfrac{1×3}{2×3}+\dfrac{1×2}{3×2}=\dfrac{3}{6}+\dfrac{2}{6}=\dfrac{3+2}{6}=\dfrac{5}{6}$

    b) $\dfrac{2}{5}+\dfrac{3}{2}=\dfrac{2×2}{5×2}+\dfrac{3×5}{2×5}=\dfrac{4}{10}+\dfrac{15}{10}=\dfrac{19}{10}$

    c) $\dfrac{2}{5}+\dfrac{3}{4}=\dfrac{2×4}{5×4}+\dfrac{3×5}{4×5}=\dfrac{8}{20}+\dfrac{15}{20}=\dfrac{23}{20}$

     

  2. @Pun

    a) 1/2 + 1/3 = 3/6 + 2/6 = 5/6

    2/5 + 3/2 = 4/10 + 15/10 = 19/10

    2/5 + 3/4 = 8/20 + 15/20 = 23/20

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

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