Solution:
1. 15 - (-11)
remove parentheses.
15 + 11
Answer:
26
2. 2 + (-4)
remove parentheses.
2 - 4
Answer:
-2
3. -8 + 8 = 0
4. -4 + 9 = 5
5. 12 + (-22)
remove parentheses.
12 - 22
Answer:
-10
6. -19 + 2
2 - 19
use this rule: a - b = -(b - a).
-(19 - 2)
use the algorithm method.
19
- 2
17
After simplification we have:
-(19 - 2) = -17
Answer:
-17
7. 8 + 12
use the algorithm method.
1
8
+ 12
20
Answer:
20
8. 13 + (-7)
remove parentheses.
13 - 7
Answer:
6
9. -6 - 8 = -14
10. -7 + 13
reoder the terms.
13 - 7
use the algorithm method.
0 13
1 3
- 7
6
Answer:
6
#Carry On Learning
