# Addition and Subtraction within 100

*Time: 15 min. 6 questions.*

## Instructions

Answer all six questions. You may use counters, blocks, or drawings to help you solve the problems. Show your thinking when asked.

## Questions

1. What is 24 + 13?
A) 35
B) 36
C) 37
D) 38
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

2. Maya has 18 stickers. She buys 22 more stickers. How many stickers does Maya have now? Write the number.
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

3. True or false: 5 + 3 + 2 gives the same answer as 3 + 5 + 2.
([Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846))

4. Sam has 50 cents. He spends 17 cents on a pencil. How much money does Sam have left?
A) 33 cents
B) 34 cents
C) 35 cents
D) 36 cents
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

5. Complete this number sentence: 30 + ____ = 50
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852))

6. You can make 100 by adding 40 + 30 + 30. True or false?
([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848))

## 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) | Add numbers up to a sum of 100 |
| 3 | [Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846) | The order in which more than two numbers are added does not affect the sum |
| 4 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852) | Subtract numbers with a maximum minuend of 100 |
| 5 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852) | Determine a missing quantity in a sum or difference within 100 |
| 6 | [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848) | Visualize 100 as a composition of multiples of 10 in various ways |

## Answer key

1. **C) 37.** Adding 24 + 13 by making a ten (24 + 10 = 34, then 34 + 3 = 37) or by adding tens and ones separately (20 + 10 = 30, then 4 + 3 = 7, then 30 + 7 = 37).

2. **40.** Adding 18 + 22 by making a ten (18 + 2 = 20, then 20 + 20 = 40) or by adding tens and ones separately (10 + 20 = 30, then 8 + 2 = 10, then 30 + 10 = 40).

3. **True.** The order in which numbers are added does not change the sum, so 5 + 3 + 2 = 10 and 3 + 5 + 2 = 10.

4. **A) 33 cents.** Subtracting 50 − 17 by counting up (17 + 3 = 20, then 20 + 30 = 50, so 3 + 30 = 33) or by subtracting tens and ones (50 − 10 = 40, then 40 − 7 = 33).

5. **20.** Adding 30 + 20 = 50, so the missing number is 20.

6. **True.** 40 + 30 + 30 = 100, which shows that 100 can be made as a composition of multiples of 10 in this way.

---
*AILI quiz · language en · model claude-haiku-4-5-20251001 · generated 2026-09-17 · id 7a49882c-c04e-47f9-b7f0-4f41944dd909*

### 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)
- node:n5: 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/29847)
- node:n6: 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/29850)
- node:n7: 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/29852)
- node:n8: 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/29851)
- node:n9: 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/29852)
- node:n10: 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/29850)
- node:n11: 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)
- node:n12: 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:n13: 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/29847)
- node:n14: 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:n15: 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/29851)
- node:n16: 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)