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

Toán Lớp 4: Câu 13: tính a) 9/24+5/8=? b) 7/15-11/30=?

Toán Lớp 4: Câu 13: tính
a) 9/24+5/8=?
b) 7/15-11/30=?

Comments ( 2 )

  1. Máy lag nặng quá nên gửi bài lên không được,Xl ạ 
     

    toan-lop-4-cau-13-tinh-a-9-24-5-8-b-7-15-11-30

  2. a)$\frac{9}{24}+\frac{5}{8}=\frac{9}{24}+\frac{15}{24}=\frac{9+15}{24}=\frac{24}{24}=1$ 
    b)$\frac{7}{15}-\frac{11}{30}=\frac{14}{30}-\frac{11}{30}=\frac{14-11}{30}=\frac{3}{30}=\frac{1}{10}$ 

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

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