# Addition and Subtraction Within 100 *30 minutes, 3 stages* When you add and subtract numbers up to 100, you are learning to solve real problems ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29844)). You might count money, measure lengths, or figure out how many things you have altogether. This homework helps you practise strategies that make these calculations faster and easier ([Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29850)). ## Stage 1: Number Facts Practice (8 min) Write the answer to each problem. These are facts you should know by heart. 1. 5 + 3 = 2. 7 + 2 = 3. 8 + 1 = 4. 6 + 4 = 5. 9 + 1 = 6. 10 − 3 = 7. 8 − 2 = 8. 9 − 4 = 9. 7 − 5 = 10. 10 − 6 = Now write three different ways to make 10. For example: 6 + 4 = 10. 11. ___ + ___ = 10 12. ___ + ___ = 10 13. ___ + ___ = 10 ## Stage 2: Two-Digit Addition (12 min) Solve these problems. You can draw tens and ones, count up, or use any strategy that works for you ([Knowledge](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29850)). 14. 23 + 15 = 15. 34 + 20 = 16. 42 + 13 = 17. 25 + 24 = 18. 50 + 30 = Now find the missing number in each problem ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)). 19. 30 + ___ = 55 20. ___ + 12 = 40 21. 20 + ___ = 48 ## Stage 3: Subtraction and Word Problems (10 min) Solve each subtraction problem ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)). 22. 35 − 10 = 23. 48 − 5 = 24. 60 − 25 = Read each problem. Write the number sentence (the addition or subtraction) and solve it ([Understanding](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29851)). 25. Maya has 28 stickers. She gets 12 more. How many stickers does she have now? Number sentence: _______________ Answer: ___ 26. There are 15 red apples and 12 green apples in a basket. How many apples are there altogether? Number sentence: _______________ Answer: ___ ## Self-check Answer these questions to see how you did. **Question 1:** Look at problem 1. Did you get 8? If yes, you solved it correctly. **Question 2:** Look at problem 6. Did you get 7? If yes, you solved it correctly. **Question 3:** Look at problem 14. Did you get 38? If yes, you added two-digit numbers correctly. **Question 4:** Look at problem 17. Did you get 49? If yes, you added two-digit numbers correctly. **Question 5:** Look at problem 22. Did you get 25? If yes, you subtracted correctly. **Question 6:** Look at problems 25 and 26. Did you write a number sentence for each one? A number sentence shows the problem as addition or subtraction. **Question 7:** Look at your answers to problems 1 to 10. Did you get most of them right? If you missed more than two, ask your teacher to help you practise those facts again. --- *AILI student homework · language en · model claude-haiku-4-5-20251001 · generated 2026-09-17 · id 02652013-bfe8-4c51-b703-fa951b2789bc* ### 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/29851) - 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/29846)