Toán Lớp 7: 15/34 + 7/21 + 19/34 – 1 15/17 + 2/3
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Toán Lớp 7: 15/34 + 7/21 + 19/34 – 1 15/17 + 2/3
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$=(\dfrac{15}{34}+\dfrac{19}{34})+(\dfrac{1}{3}+\dfrac{2}{3})-\dfrac{32}{17}$
$=1+1-\dfrac{32}{17}$