Answer:
1. 11 and 20
2. 30 and 48
3. 43 and 55
4. 39 and 28
5. 70
6 (-6)
7. 14
8. ?
9. +9
10. + 10 and x8
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Answers & Comments
Answer:
1. 11 and 20
2. 30 and 48
3. 43 and 55
4. 39 and 28
5. 70
6 (-6)
7. 14
8. ?
9. +9
10. + 10 and x8