Вычислим:
1) (1/9 + 1/3) : 2/3 = 3/9 * 3/2 = 1/3 * 3/2 = 1/2 = 0,5;
2) 12 * (2/3 - 1/4) = 12 * (8/12 - 3/12) = 12 * 5/12 = 5;
3) 3/4 : 12 - 1/32 = 3/4 * 1/12 - 1/32 = 3/48 - 1/32 = 1/16 - 1/32 = 2/32 - 1/32 = 1/32;
4) 1 1/5 : 2/3 + 1/3 = 6/5 * 3/2 + 1/3 = 18/10 + 1/3 = 9/5 + 1/3 = 27/15 + 5/15 = 32/15.
Вычислим:
1) (1/9 + 1/3) : 2/3 = 3/9 * 3/2 = 1/3 * 3/2 = 1/2 = 0,5;
2) 12 * (2/3 - 1/4) = 12 * (8/12 - 3/12) = 12 * 5/12 = 5;
3) 3/4 : 12 - 1/32 = 3/4 * 1/12 - 1/32 = 3/48 - 1/32 = 1/16 - 1/32 = 2/32 - 1/32 = 1/32;
4) 1 1/5 : 2/3 + 1/3 = 6/5 * 3/2 + 1/3 = 18/10 + 1/3 = 9/5 + 1/3 = 27/15 + 5/15 = 32/15.