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Question

tính nhanh 2 phần 3 + (5 phần 7 + âm 2 phần 3)

☆Châuuu~~~(๑╹ω╹๑ )☆ · Accepted Answer

$=\dfrac{2}{3}+\left(\dfrac{5}{7}+\dfrac{-2}{3}\right)=\left[\dfrac{2}{3}+\dfrac{-2}{3}\right]+\dfrac{5}{7}\
=0+\dfrac{5}{7}=\dfrac{5}{7}$Câu trả lời: $=\dfrac{2}{3}+\left(\dfrac{5}{7}+\dfrac{-2}{3}\right)=\left[\dfrac{2}{3}+\dfrac{-2}{3}\right]+\dfrac{5}{7}\
=0+\dfrac{5}{7}=\dfrac{5}{7}$

Thư Phan · Answer

$\dfrac{2}{3}+\left(\dfrac{5}{7}+\dfrac{-2}{3}\right)=\dfrac{2}{3}+\dfrac{5}{7}+\dfrac{-2}{3}=\left(\dfrac{2}{3}+\dfrac{-2}{3}\right)+\dfrac{5}{7}=0+\dfrac{5}{7}=\dfrac{5}{7}$Câu trả lời: $\dfrac{2}{3}+\left(\dfrac{5}{7}+\dfrac{-2}{3}\right)=\dfrac{2}{3}+\dfrac{5}{7}+\dfrac{-2}{3}=\left(\dfrac{2}{3}+\dfrac{-2}{3}\right)+\dfrac{5}{7}=0+\dfrac{5}{7}=\dfrac{5}{7}$

ttanjjiro kamado · Answer

$\dfrac{5}{7}$ chăngCâu trả lời: $\dfrac{5}{7}$ chăng

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