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Jawaban:
1. 7/9 + 2/9
= 9/9
= 1
2. 4/4 + 6/8
= 8/8 + 6/8
= 14/8
= 7/4
3. 3/10 + 6 5/3
= 3/10 + 23/3
= 9/30 + 230/30
= 239/30
4. 3 1/12 + 5 6/3
= 37/12 + 21/3
= 37/12 + 84/12
= 121/12
5. 3/4 + 8/3 + 5/12
= 12/12 + 32/12 + 5/12
= 49/12
6. 7/15 – 3/15
= 4/15
7. 18 – 2/4
= 18 – 2 : 2 / 4 : 2
= 18 – 1/2
= 17 1/2
8. 4 4/6 + 2/3
= 28/6 + 2/3
= 28/6 + 6/6
= 34/6.
= 17/3.
9. 8 2/6 – 4 1/3
= 50/6 – 13/3
= 50/6 – 26/6
= 24/6
= 12/3
= 4/1
10. 24/18 – 2/3 – 2/6
= 24/18 – 12/18 – 6/18
= 6/8
= 3/4