Question

Oblicz
1. 7/8 + 3/4
2. 4/5 - 2/3
3. 4 3/10 + 2/5
4. 7 2/3 - 5 5/6
5. 4/9 · 12
6. 7/10 · 5/6
7. 1 1/7 · 2 1/8
8. 9/10 : 3/7
9. 6 2/5 : 4 1/5

Answer 1

1. 7/8 + 3/4 = 7/8 + 6/8 = 13/8 = 1 5/8
2. 4/5 - 2/3 = 12/15 - 10/15 = 2/15
3. 4 3/10 + 2/5 = 4 3/10 + 4/10 = 4 7/10
4. 7 2/3 - 5 5/6 = 7 4/6 - 5 5/6 = 6 10/6 - 5 5/6 = 1 5/6
5. 4/9 · 12 = 4/9 * 12/1 = 48/9
6. 7/10 · 5/6 =7/2 * 1/6 = 7/12
7. 1 1/7 · 2 1/8 = 8/7 * 17/8 = 1/7 * 17/1 = 17/7 = 2 3/17
8. 9/10 : 3/7 =9/10 * 7/3 = 3/10 * 7/1 = 21/10 = 2 1/10
9. 6 2/5 : 4 1/5= 32/5 : 21/5 = 32/5 * 5/21 = 32/1 * 1/21 = 32/21 = 1 11/21