Addition
2+2+6
10
10+15
25
20-9-3
14
12-8
4
When my operation makes my answer get greater what have I done?
Addition
9+2+4
15
12+19
31
22-11-8
3
56-39
17
Do I need to carry or borrow in this problem?
235+147
Yes, because 7+5= 12
15 + 10 + 25
50
25 + 26
51
31-23
8
32-18
14
Do I need the algorithm to solve this? 799-499
No, I can skip count hundreds from 7 to 4 to get the answer of 300
20 + 6+10
36
56+42
98
88-67
21
97 - 24
73
Do I need to carry or borrow in this problem?
548-392
Yes, because 4 tens minus 9 tens you have to borrow.
8+7+9
24
28+23
51
61-48
13
47-23
24
BONUS Vocabulary: What is the answer to an addition and Subtraction problem called?
Sum & Difference