Worksheet 1Worksheet 2Worksheet 3

The download includes this worksheet followed by the answer key with explanations. In the print dialog choose “Save as PDF” to download.

lessonbunny.com
Name: ______________________________ Date: ______________

Addition Within 10

Grade 1 · Mathematics · Worksheet 2

  1. Kaia has 5 crayons. Kaia's friend gives 5 more crayons. How many crayons does Kaia have now? Answer: ______________
  2. 0 + 9 = ? Answer: ______________
  3. Matiu has 2 stickers. Matiu's mom gives 8 more stickers for being good. How many stickers does Matiu have altogether? Answer: ______________
  4. Noah has 6 toy dinosaurs. For his birthday, he gets 3 more toy dinosaurs from his grandma. How many toy dinosaurs does Noah have now? Answer: ______________
  5. 0 + 1 = ? Answer: ______________
  6. 2 + 4 = ? Answer: ______________
  7. 2 + 3 = ? Answer: ______________
  8. 0 + 8 = ? Answer: ______________
  9. There are 5 red circles in a row. Below them are 3 blue circles in another row. How many circles are there in total? Answer: ______________
  10. Tom has 5 stickers. Tom's mom gives 2 more stickers for being good. How many stickers does Tom have altogether? Answer: ______________
lessonbunny.com

Answer Key & Explanations

Addition Within 10 · Grade 1 · Worksheet 2

  1. Kaia has 5 crayons. Kaia's friend gives 5 more crayons. How many crayons does Kaia have now? Answer: 10 Solution: Start with 5 crayons. Add the 5 crayons that were given: 5 + 5 = 10.
    Full step-by-step solution

    Step 1: Start with 5 crayons. Step 2: Add the 5 crayons that were given: 5 + 5 = 10. The answer is 10 crayons.

  2. 0 + 9 = ? Answer: 9 Solution: 0 + 9 = 9. You can count on from 0 to get 9.
  3. Matiu has 2 stickers. Matiu's mom gives 8 more stickers for being good. How many stickers does Matiu have altogether? Answer: 10 Solution: Count the 2 stickers Matiu already has. Add the 8 new stickers: 2 + 8 = 10.
    Full step-by-step solution

    Step 1: Count the 2 stickers Matiu already has. Step 2: Add the 8 new stickers: 2 + 8 = 10. The answer is 10 stickers.

  4. Noah has 6 toy dinosaurs. For his birthday, he gets 3 more toy dinosaurs from his grandma. How many toy dinosaurs does Noah have now? Answer: 9 Solution: Noah starts with 6 toy dinosaurs. He gets 3 more toy dinosaurs. Add the two amounts together: 6 + 3 6 + 3 = 9 Noah has 9 toy dinosaurs now.
    Full step-by-step solution

    Step 1: Noah starts with 6 toy dinosaurs. Step 2: He gets 3 more toy dinosaurs. Step 3: Add the two amounts together: 6 + 3 Step 4: 6 + 3 = 9 Noah has 9 toy dinosaurs now.

  5. 0 + 1 = ? Answer: 1 Solution: 0 + 1 = 1. You can count on from 0 to get 1.
  6. 2 + 4 = ? Answer: 6 Solution: 2 + 4 = 6. You can count on from 2 to get 6.
  7. 2 + 3 = ? Answer: 5 Solution: 2 + 3 = 5. You can count on from 2 to get 5.
  8. 0 + 8 = ? Answer: 8 Solution: 0 + 8 = 8. You can count on from 0 to get 8.
  9. There are 5 red circles in a row. Below them are 3 blue circles in another row. How many circles are there in total? Answer: 8 Solution: Count the red circles: 5 Count the blue circles: 3 Add them together: 5 + 3 5 + 3 = 8 The answer is 8.
    Full step-by-step solution

    Step 1: Count the red circles: 5 Step 2: Count the blue circles: 3 Step 3: Add them together: 5 + 3 Step 4: 5 + 3 = 8 The answer is 8.

  10. Tom has 5 stickers. Tom's mom gives 2 more stickers for being good. How many stickers does Tom have altogether? Answer: 7 Solution: Count the 5 stickers Tom already has. Add the 2 new stickers: 5 + 2 = 7.
    Full step-by-step solution

    Step 1: Count the 5 stickers Tom already has. Step 2: Add the 2 new stickers: 5 + 2 = 7. The answer is 7 stickers.