This document contains 20 math word problems involving addition, subtraction, multiplication and grouping symbols. The problems include single-digit and double-digit numbers, with both positive and negative values. They require solving basic arithmetic operations such as addition, subtraction, multiplication and evaluating expressions with grouping symbols.

1. กิจกรรมที่ 1
1. - 3 + 2 =
2. - 8 - 3 =
3. 2( - 6) =
4. 7 - 10 =
5. -2 + 6 =
6. - 4 - (- 2) =
7. - (- 3) - 5 =
8. 9(1 - 3) =
9. - 2(- 5) =
10. 8 - 12 =
11. - 7 + ( - 3 ) =
12. -5 + 13 =
13. (- 4)(- 7) =
14. 2 - (- 5) =
15. - 6 - 4 =
16. (- 4)(- 2 - 1) =
17. - (- 6) + 5 =
18. - 3(5 - 3) =
19. (- 2)(- 3)(4) =
20. 9 - 15 =
2
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