Addition & Subtraction to 20
Solve addition and subtraction problems up to 20
Addition up to 20
Addition means putting numbers together. We use the + sign. When we add, we count on from the bigger number. For example: 8 + 5 — start at 8 and count on 5 more: 9, 10, 11, 12, 13. So 8 + 5 = 13!
Subtraction up to 20
Subtraction means taking away. We use the − sign. When we subtract, we count backwards. For example: 15 − 6 — start at 15 and count back 6: 14, 13, 12, 11, 10, 9. So 15 − 6 = 9!
Example
Practice Problems
7 + 8 = 15 ✅
12 + 6 = 18 ✅
14 − 5 = 9 ✅
20 − 7 = 13 ✅
🍭🍭🍭🍭🍭 + 🍭🍭🍭 = 🍭🍭🍭🍭🍭🍭🍭🍭 → 5 + 3 = 8!
Note
Remember
Addition makes the number bigger. Subtraction makes it smaller. You can use your fingers, draw pictures, or use a number line to help you add and subtract!
Key Vocabulary
AdditionPutting numbers together to get more
SubtractionTaking a number away to get less
PlusThe + sign that means add
MinusThe − sign that means take away
SumThe answer when we add
DifferenceThe answer when we subtract
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Addition
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