Giải Bài 3 trang 23 Vở thực hành Toán 5

Lời giải

a) $\dfrac{57}{10} = \dfrac{50+7}{10} = \dfrac{50}{10} + \dfrac{7}{10} = 5 + \dfrac{7}{10} = 5\dfrac{7}{10}$.

b) $\dfrac{703}{100} = \dfrac{700+3}{100} = \dfrac{700}{100} + \dfrac{3}{100} = 7 + \dfrac{3}{100} = 7\dfrac{3}{100}$.

c) $\dfrac{63}{10} = \dfrac{60+3}{10} = \dfrac{60}{10} + \dfrac{3}{10} = 6 + \dfrac{3}{10} = 6\dfrac{3}{10}$.

d) $\dfrac{3\,005}{1\,000} = \dfrac{3\,000+5}{1\,000} = \dfrac{3\,000}{1\,000} + \dfrac{5}{1\,000} = 3 + \dfrac{5}{1\,000} = 3\dfrac{5}{1\,000}$.

Đáp số