# Addition and Subtraction Within 100 This sheet gives you practice adding and subtracting numbers up to 100 ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29844)). You will use number facts, check your answers, and solve word problems ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)). ## Exercises **1. Quick facts.** Fill in each blank. Use facts you know by heart. | Fact | Answer | |---|---| | 6 + 7 = | ______ | | 9 + 8 = | ______ | | 13 − 6 = | ______ | | 15 − 9 = | ______ | | 5 + 5 + 5 = | ______ | **2. Two-digit addition and subtraction.** Solve each problem. Show your work in the space beside it. a) 34 + 28 = ______ b) 56 − 19 = ______ c) 47 + 45 = ______ d) 82 − 37 = ______ **3. Check your work.** Solve the problem, then use the inverse operation to verify your answer ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)). 63 − 25 = ______ Check: 25 + ______ = 63 **4. Missing number.** Find the missing quantity in each equation ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29852)). a) 40 + ______ = 70 b) ______ − 18 = 22 c) 55 + ______ = 100 d) 90 − ______ = 46 **5. Composing 100.** Complete each way to make 100 using multiples of ten ([Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848), [Skills](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29848)). a) 10 + 10 + ______ + 40 = 100 b) 30 + ______ + 30 = 100 c) 60 + ______ = 100 d) Circle the equation below that also equals 100: A) 20 + 30 + 40 = 100 B) 50 + 40 + 10 = 100 C) 70 + 10 + 10 = 100 D) 25 + 25 + 25 = 100 **6. Word problems.** Solve each problem. Write your answer on the line ([Understanding](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/29851)). a) Maya has 38 stickers. Her friend gives her 27 more. How many stickers does Maya have now? Answer: ______ b) A ribbon is 92 centimetres long. Ben cuts off 46 centimetres. How long is the ribbon now? Answer: ______ c) There are 24 apples in one basket and 19 apples in another basket. How many apples in total? Answer: ______ ## Answer key 1. 13, 17, 7, 6, 15 2. a) 62 b) 37 c) 92 d) 45 3. 38; check: 25 + 38 = 63 4. a) 30 b) 40 c) 45 d) 44 5. a) 40 b) 40 c) 40 d) B and C are both correct (accept either) 6. a) 65 stickers b) 46 centimetres c) 43 apples --- *AILI homework sheet · language en · model claude-sonnet-5 · generated 2026-09-17 · id dc509594-5279-44bc-a1ba-fae71450b13a* ### 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) - resource:r1: Resources › type#activity, type#classroomactivity › MAT2, MAT3, MAT4, MAT5 (https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/zcsdujXlaUa2uuq1-kBv0Q)