Q.1 Match word problems to addition sentences -sums up to 20
What is an addition word problem?
An addition word problem is a short story that tells about putting groups together to find a total. When we add, the number gets bigger.
- There are 3 apples on the table. I add 2 more apples.
- This word problem shows adding groups together.
Look for clues that tell you groups are being joined.
What is an addition sentence?
An addition sentence uses numbers and symbols to show addition. It includes a plus sign (+) and an equals sign (=).
- 3 + 2 = 5
- This sentence matches the apple word problem.
The equals sign means “the same as.”
Matching a word problem to an addition sentence
To match a word problem to an addition sentence, find the numbers in the story and see how they are added together.
- There are 4 birds in a tree. 1 more bird flies in. → 4 + 1 = 5
- I have 6 crayons. My friend gives me 3 more. → 6 + 3 = 9
The order of the numbers does not change the total.
Using numbers from 0 to 19
In first grade, you add numbers from 0 to 19. The sum will be 20 or less.
- 0 + 7 = 7
- 8 + 5 = 13
- 10 + 9 = 19
- 12 + 6 = 18
Adding zero does not change the number.
Clue words that tell you to add
Some words in a problem help you know that you should add.
- in all
- altogether
- more
- total
Clue words help you choose the correct math sentence.
Checking your match
After matching a word problem to an addition sentence, check to see if it makes sense.
- There are 11 balloons. 4 more balloons are added.
- Add: 11 + 4 = 15
- The total is 15 balloons.
Ask yourself if the total is reasonable.
Common Core alignment: CCSS.MATH.CONTENT.1.OA.A.1 – Use addition within 20 to solve word problems.
Notes for teachers
This free lesson is aligned with CCSS.MATH.CONTENT.1.OA.A.1. Use it for whole-class instruction, small groups, or independent practice.
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