Question

Мне! заранее добрым людям . найдите значение выражений: 1) 3/4 - 1/3; 2) 3/4 - 4/9; 3) 11/12 - 11/18

Answer 1

1) $\frac{3}{4} - \frac{1}{3} = \frac{3*3}{4*3} - \frac{1*4}{3*4} = \frac{9}{12} - \frac{4}{12} = \frac{5}{12}$

2) $\frac{3}{4} - \frac{4}{9} = \frac{3*9}{4*9} - \frac{4*4}{9*4} = \frac{27}{36} - \frac{16}{36} = \frac{11}{36}$

3) $\frac{11}{12} - \frac{11}{18} = \frac{11}{12} - \frac{11}{18} = \frac{11*3}{12*3} - \frac{11*2}{18*2} = \frac{33}{36} - \frac{22}{36} = \frac{11}{36}$

Answer 2

1)5/12, 2)11/36, 3)11/36.