\(\dfrac{3}{4}+\dfrac{2}{3}=\dfrac{9+8}{12}=\dfrac{17}{12}\)
\(\dfrac{13}{5}-\dfrac{2}{1}=\dfrac{13-10}{5}=\dfrac{3}{5}\)
\(\dfrac{4\text{×}3}{7\text{×}4}=\dfrac{12}{28}\)
\(\dfrac{6\text{×}3}{1\text{×}2}=\dfrac{18}{2}\)
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bài2)
3/4 + 2/3 = 17/12
13/5 - 10/5 = 3/5
4/7 x 3/4 = 3/7
6 : 2/3 = 6 x 3/2 = 9
Đúng 2
Bình luận (1)
