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Addition Within 10

Grade 1 · Mathematics · Worksheet 2

  1. Matiu has 2 stickers. Matiu's mom gives 8 more stickers for being good. How many stickers does Matiu have altogether? Answer: ______________
  2. 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: ______________
  3. 0 + 10 = ? Answer: ______________
  4. Lily sees 4 birds in a tree. Then 3 more birds fly over and land in the same tree. How many birds are in the tree now? Answer: ______________
  5. 0 + 9 = ? Answer: ______________
  6. 3 + 3 = ? Answer: ______________
  7. 3 + 2 = ? Answer: ______________
  8. 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: ______________
  9. Tom has 5 stickers. Tom's mom gives 2 more stickers for being good. How many stickers does Tom have altogether? Answer: ______________
  10. 2 + 2 = ? Answer: ______________
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Answer Key & Explanations

Addition Within 10 · Grade 1 · Worksheet 2

  1. 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.

  2. 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.

  3. 0 + 10 = ? Answer: 10 Solution: 0 + 10 = 10. You can count on from 0 to get 10.
  4. Lily sees 4 birds in a tree. Then 3 more birds fly over and land in the same tree. How many birds are in the tree now? Answer: 7 Solution: There are 4 birds in the tree. Add the 3 birds that flew over: 4 + 3 = 7.
    Full step-by-step solution

    Step 1: There are 4 birds in the tree. Step 2: Add the 3 birds that flew over: 4 + 3 = 7. The answer is 7 birds.

  5. 0 + 9 = ? Answer: 9 Solution: 0 + 9 = 9. You can count on from 0 to get 9.
  6. 3 + 3 = ? Answer: 6 Solution: 3 + 3 = 6. You can count on from 3 to get 6.
  7. 3 + 2 = ? Answer: 5 Solution: 3 + 2 = 5. You can count on from 3 to get 5.
  8. 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.

  9. 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.

  10. 2 + 2 = ? Answer: 4 Solution: 2 + 2 = 4. You can count on from 2 to get 4.