# Addition and Subtraction within 100 Crossword

In Grade 2, you 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 ideas: you can **combine** quantities to find the **whole**, **compare** two numbers to see which is bigger, find a **missing** number in an equation, and **solve** problems by adding or subtracting. Some clues ask you to **double** a number (add it to itself) or spot a **pattern** in the answers. When you finish, check that both sides of the equal sign are **equal** ([Details](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29846)).

## How to play

- Read each clue. Its number matches a numbered square in the grid.
- Write one capital letter in each square. There are 4 words across and 4 words down.
- Crossing words share a letter, so check it fits both. The answer key shows the finished grid.

## Puzzle grid

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

## Clues

### Across

2. To see how two things are the same or different. (7)
5. To put things together. (7)
7. All the parts put together. (5)
8. The same amount or size. (5)

### Down

1. Things that repeat in the same way over and over. (7)
3. Not there; not found. (7)
4. Two of the same amount. (6)
6. To find the answer to a problem. (5)

## Answer key

- **1 down**: PATTERN
- **2 across**: COMPARE
- **3 down**: MISSING
- **4 down**: DOUBLE
- **5 across**: COMBINE
- **6 down**: SOLVE
- **7 across**: WHOLE
- **8 across**: EQUAL

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

---
*AILI game · language en · model claude-haiku-4-5-20251001 · generated 2026-09-17 · id 6443ce7b-3689-4b88-ac1a-9b5ec59df890*

### 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)