A. Add each of the following and apply the Properties of Addition if necessary.
1. 23 +-22 +7 +2
2. -26 +-6 + 12 +-18
3. 2 + -45 +33 + -40
4. 34 +-28 +-35 + 16 + 7
5. 117 + 145 + 167 + -156
6.21 + -44 + 15 + -34
7. 3 + -78 + -4 + -27
8. 56 +-24 +-45 +-27
9. 118 + 119 + -180 + -190
10.239 +- 228 + 187 + -178
1. 23 +-22 +7 +2
2. -26 +-6 + 12 +-18
3. 2 + -45 +33 + -40
4. 34 +-28 +-35 + 16 + 7
5. 117 + 145 + 167 + -156
6.21 + -44 + 15 + -34
7. 3 + -78 + -4 + -27
8. 56 +-24 +-45 +-27
9. 118 + 119 + -180 + -190
10.239 +- 228 + 187 + -178
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Answer:
1. 23 +-22 +7 +2=10
2.-26 +-6 + 12 +-18=-38
3. 2 + -45 +33 + -40=-50
4. 34 +-28 +-35 + 16 + 7=-6
5. 117 + 145 + 167 + -156=273
6.21 + -44 + 15 + -34=-42
7. 3 + -78 + -4 + -27=-106
8. 56 +-24 +-45 +-27=-40
9. 118 + 119 + -180 + -190=-133
10.239 +- 228 + 187 + -178=20
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