câu 5
\(\dfrac{2}{3}< \dfrac{8}{9}và\dfrac{2}{1}>\dfrac{1}{2}\)

câu 1 nhé

\(1.\dfrac{20}{60}+\dfrac{15}{60}+\dfrac{12}{50}=\dfrac{47}{60}\)

Từ láy:loắt choắt,xinh xinh,thoăn thoắt,nghêng nghênh

Số thứ 1 là

   700 : ( 4 + 1 ) x 4= 560

Số thứ 2 là:
      700 - 560 = 140 
               Đ/S:...
 

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