1. 19 – 5 =
2. 38 – 21 =
3. 27 – 12 =
4. 32 – 21 =
5. 44 – 12 =
6. 36 – 15 =
7. 25 – 12 =
8. 29 – 20 =
9. 24 – 13 =
10.37 – 16 =
1. 48 – 17 =
2. 87 – 10 =
3. 67 – 51 =
4. 25 – 15 =
5. 49 – 32 =
6. 87 – 16 =
7. 76 – 25 =
8. 97 – 24 =
9. 45 – 23 =
10.71 – 20 =
1. 2 + (3 + 1) = + =
2. 21 + (5 + 5) = + =
3. 2 4 + (5 + 6) = + =
4. 7 5 + (7 + 13) = + =
5. (1 + 5) + 7 = + =
6. 12 + (8 + 7) = + =
7. 13 + (6 + 7) = + =
8. 16 + (2 + 8) = + =
9. (10 + 3) + 7 = + =
10.15 + (4 + 5) = + =
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