Adding Within 20 (Make a Ten)
A Grade 1 addition page in three boxed parts: 12 facts within 20, two make-a-ten problems that show the strategy step by step, and a short story problem about stickers. Clean layout with plenty of writing space and a small watercolor illustration.
How to use this worksheet
- Solve the 12 facts in Part A. Counting on from the bigger number is a good strategy.
- In Part B, split the second number to make 10 first, then finish the sum.
- Read the story problem in Part C, write a number sentence and answer in a full sentence.
What your child practices
Adding within 20, a core Grade 1 skill in US standards, plus the make-a-ten strategy (8 + 5 = 10 + 3) that helps children move past counting on their fingers. The story problem practices turning words into a number sentence. Answers: A) 13, 15, 12, 16, 12, 18, 15, 16, 17, 15, 17, 13; B) 3 and 13, 5 and 15; C) 16 stickers.
Who it is for
Made for first graders around six to seven who know their facts to 10. If the make-a-ten boxes are new, use ten-frames, egg cartons or two rows of five coins to show how the numbers split.
Practice ideas
Play "make ten" with a deck of cards (pairs that add to 10), or roll two dice and add, saying the make-a-ten step out loud for sums over 10. Five minutes a day builds fluency faster than long sessions.