Anonymous

Tính. 11/12 - 2/3

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Giải VBT Toán lớp 4 Bài 61: Phép trừ phân số

a) $\frac{11}{12} - \frac{2}{3} = \frac{11}{12} - \frac{8}{12} = \frac{3}{12}$

c) $\frac{5}{7} - \frac{8}{21} = \frac{15}{21} - \frac{8}{21} = \frac{7}{21} = \frac{1}{3}$

b) $\frac{5}{9} - \frac{5}{18} = \frac{10}{18} - \frac{5}{18} = \frac{5}{18}$

d) $\frac{17}{18} - \frac{5}{6} = \frac{17}{18} - \frac{15}{18} = \frac{1}{9}$

a) $\frac{11}{12} - \frac{2}{3} = \frac{11}{12} - \frac{8}{12} = \frac{3}{12}$

c) $\frac{5}{7} - \frac{8}{21} = \frac{15}{21} - \frac{8}{21} = \frac{7}{21} = \frac{1}{3}$

b) $\frac{5}{9} - \frac{5}{18} = \frac{10}{18} - \frac{5}{18} = \frac{5}{18}$

d) $\frac{17}{18} - \frac{5}{6} = \frac{17}{18} - \frac{15}{18} = \frac{1}{9}$