# Addition and Subtraction Within 100

*Time: 15 min. 6 questions.*

## Instructions

Answer all six questions. You may use pictures, numbers, or words to show your thinking. For questions that ask you to find a number, write the number clearly. For true or false questions, circle the word that is correct.

## Questions

1. What is 24 + 13?
A) 35
B) 37
C) 39
D) 41
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

2. Maya has 18 stickers. She gets 12 more stickers. How many stickers does Maya have now? Show your work or explain how you found your answer.
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

3. True or false: 15 + 20 + 5 gives the same answer as 5 + 15 + 20.
([Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846))

4. There are 42 apples in a basket. Some apples are red and some are green. Write two different ways to make 42 using addition.
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848))

5. Which number sentence is correct?
A) 50 − 18 = 32
B) 50 − 18 = 28
C) 50 − 18 = 35
D) 50 − 18 = 42
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

6. Sam has 37 toy cars. He gives away 15 cars. How many cars does Sam have left?
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

## Curriculum Coverage

| Question | Learning Outcome | Content |
|---|---|---|
| 1 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852) | Add numbers up to a sum of 100 |
| 2 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852) | Solve problems using addition of countable quantities |
| 3 | [Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846) | Associative property of addition |
| 4 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848) | Compose a sum in multiple ways |
| 5 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852) | Subtract numbers with a maximum minuend of 100 |
| 6 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852) | Solve problems using subtraction of countable quantities |

## Answer Key

1. **B) 37.** Adding 24 + 13 by making a ten or counting on gives 37 ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)).

2. **30 stickers.** Maya starts with 18 and adds 12 more, which equals 30 ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)).

3. **True.** The order in which numbers are added does not change the sum; both equal 40 ([Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846)).

4. **Any two of these: 40 + 2, 30 + 12, 20 + 22, 35 + 7.** A sum can be made in many ways ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848)).

5. **A) 50 − 18 = 32.** Subtracting 18 from 50 leaves 32 ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)).

6. **22 cars.** Sam starts with 37 and gives away 15, leaving 22 ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)).

---
*AILI quiz · language en · model claude-haiku-4-5-20251001 · generated 2026-09-17 · id 00d5f461-a61a-40e9-8688-a5749651d03a*

### Sources

- node:n1: Mathematics › Mathematics (K–6) › Grade 2 › Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29843)
- node:n2: Mathematics › Mathematics (K–6) › Grade 2 › Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. › How can addition and subtraction be interpreted? (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29844)
- node:n3: Mathematics › Mathematics (K–6) › Grade 2 › Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. › How can addition and subtraction be interpreted? › Students investigate addition and subtraction within 100. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846)
- node:n4: Mathematics › Mathematics (K–6) › Grade 2 › Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. › How can addition and subtraction be interpreted? › Students investigate addition and subtraction within 100. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848)
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- resource:r1: Resources › type#activity, type#classroomactivity › MAT2, MAT3, MAT4, MAT5 (https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/zcsdujXlaUa2uuq1-kBv0Q)