# Addition and Subtraction Within 100

In Grade 2, students investigate addition and subtraction within 100 ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29844)). This crossword puzzle helps you practise key words and ideas from your math learning. You will work with words like WHOLE, PART, SUM, MINUS, EQUAL, DOUBLE, TEN, and HUNDRED as you solve clues about adding and subtracting ([Details](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846)).

## How to play

Read each clue carefully. Think about what number word or math word it is asking for. Write the letters across (left to right) or down (top to bottom) to fill the grid. Check your answers by reading the clues again.

## Puzzle grid

| ■ | ■ | ■ | ■ | ■ | ■ | ■ | ■ | ■ | 1 | ■ |
|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
| ■ | ■ | ■ | ■ | ■ | 2 | ■ | ■ | ■ |   | ■ |
| ■ | ■ | ■ | ■ | ■ |   | ■ | ■ | ■ |   | ■ |
| ■ | ■ | ■ | ■ | ■ |   | ■ | ■ | ■ |   | ■ |
| ■ | ■ | ■ | ■ | 3 |   |   | 4 |   |   |   |
| ■ | ■ | ■ | ■ | ■ |   | ■ |   | ■ | ■ | ■ |
| ■ | ■ | ■ | ■ | ■ | ■ | 5 |   |   | ■ | ■ |
| 6 |   |   | 7 | ■ | ■ | ■ |   | ■ | ■ | ■ |
| ■ | ■ | ■ | 8 |   |   |   |   | ■ | ■ | ■ |
| ■ | ■ | ■ |   | ■ | ■ | ■ |   | ■ | ■ | ■ |

## Clues

### Across

3. The number made of ten groups of ten. (7)
5. The answer you get when you add two numbers together. (3)
6. A piece of something larger. (4)
8. The same amount or value on both sides. (5)

### Down

1. All the parts put together as one. (5)
2. The sign that means to take away. (5)
4. A number added to itself, or twice as much. (6)
7. The number that comes after nine. (3)

## Answer key

- **1 down**: WHOLE
- **2 down**: MINUS
- **3 across**: HUNDRED
- **4 down**: DOUBLE
- **5 across**: SUM
- **6 across**: PART
- **7 down**: TEN
- **8 across**: EQUAL

| ■ | ■ | ■ | ■ | ■ | ■ | ■ | ■ | ■ | W | ■ |
|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
| ■ | ■ | ■ | ■ | ■ | M | ■ | ■ | ■ | H | ■ |
| ■ | ■ | ■ | ■ | ■ | I | ■ | ■ | ■ | O | ■ |
| ■ | ■ | ■ | ■ | ■ | N | ■ | ■ | ■ | L | ■ |
| ■ | ■ | ■ | ■ | H | U | N | D | R | E | D |
| ■ | ■ | ■ | ■ | ■ | S | ■ | O | ■ | ■ | ■ |
| ■ | ■ | ■ | ■ | ■ | ■ | S | U | M | ■ | ■ |
| P | A | R | T | ■ | ■ | ■ | B | ■ | ■ | ■ |
| ■ | ■ | ■ | E | Q | U | A | L | ■ | ■ | ■ |
| ■ | ■ | ■ | N | ■ | ■ | ■ | E | ■ | ■ | ■ |

---
*AILI game · language en · model claude-haiku-4-5-20251001 · generated 2026-09-17 · id 5f43ad60-e6a8-4d02-991f-5f7a0d6cfe14*

### Sources

- node:n1: Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29733)
- node:n2: How can addition and subtraction provide perspectives of number? (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29756)
- node:n3: Students examine addition and subtraction within 20. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29757)
- node:n4: Details (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29759)
- node:n5: Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29820)
- node:n6: How can addition and subtraction be interpreted? (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29843)
- node:n7: Students investigate addition and subtraction within 100. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29844)
- node:n8: Details (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846)
- node:n9: Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29915)
- node:n10: How can processes be established for addition and subtraction? (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29922)
- node:n11: Students apply strategies for addition and subtraction within 1000. (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29923)
- node:n12: Details (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29925)