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Add Three Numbers

Grade 1 · Mathematics · Worksheet 1

  1. Tane has 9 toy cars. His friend Aroha gives him 7 more toy cars for his birthday. Then Tane finds 2 more toy cars under his bed. How many toy cars does Tane have now? Answer: ______________
  2. Sophia has 8 red crayons, 7 blue crayons, and 6 green crayons. How many crayons does Sophia have in all? Answer: ______________
  3. Matiu has 12 toy cars. His friend Hana gives him 7 more toy cars for his birthday. Then his grandmother gives him 4 more toy cars. How many toy cars does Matiu have now? Answer: ______________
  4. 6 + 5 + 4 = ? Answer: ______________
  5. Aroha has 3 red balloons, 5 blue balloons, and 1 yellow balloon. How many balloons does Aroha have in all? Answer: ______________
  6. 7 + 4 + 5 = ? Answer: ______________
  7. 3 + 4 + 2 = ? Answer: ______________
  8. A triangle has 3 sides. One side is 5 blocks long, another side is 4 blocks long, and the last side is 6 blocks long. How many blocks are used to make all three sides of the triangle? Answer: ______________
  9. Emma has 6 stickers. Her friend Noah gives her 4 more stickers. Then Emma's teacher gives her 3 more stickers for good work. How many stickers does Emma have in total? Answer: ______________
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Answer Key & Explanations

Add Three Numbers · Grade 1 · Worksheet 1

  1. Tane has 9 toy cars. His friend Aroha gives him 7 more toy cars for his birthday. Then Tane finds 2 more toy cars under his bed. How many toy cars does Tane have now? Answer: 18 Solution: Tane starts with 9 toy cars. Aroha gives him 7 more: 9 + 7 = 16 He finds 2 more under his bed: 16 + 2 = 18 Tane has 18 toy cars in total.
    Full step-by-step solution

    Step 1: Tane starts with 9 toy cars. Step 2: Aroha gives him 7 more: 9 + 7 = 16 Step 3: He finds 2 more under his bed: 16 + 2 = 18 Tane has 18 toy cars in total. The answer is 18.

  2. Sophia has 8 red crayons, 7 blue crayons, and 6 green crayons. How many crayons does Sophia have in all? Answer: 21 Solution: Start with the red crayons: 8 Add the blue crayons: 8 + 7 = 15 Add the green crayons: 15 + 6 = 21 Sophia has 21 crayons in all.
    Full step-by-step solution

    Step 1: Start with the red crayons: 8 Step 2: Add the blue crayons: 8 + 7 = 15 Step 3: Add the green crayons: 15 + 6 = 21 Sophia has 21 crayons in all. The answer is 21.

  3. Matiu has 12 toy cars. His friend Hana gives him 7 more toy cars for his birthday. Then his grandmother gives him 4 more toy cars. How many toy cars does Matiu have now? Answer: 23 Solution: Matiu starts with 12 toy cars. Hana gives him 7 more: 12 + 7 = 19 His grandmother gives him 4 more: 19 + 4 = 23 Matiu has 23 toy cars in total.
    Full step-by-step solution

    Step 1: Matiu starts with 12 toy cars. Step 2: Hana gives him 7 more: 12 + 7 = 19 Step 3: His grandmother gives him 4 more: 19 + 4 = 23 Matiu has 23 toy cars in total.

  4. 6 + 5 + 4 = ? Answer: 15 Solution: Add the first two numbers: 6 + 5 = 11 Add the third number to the result: 11 + 4 = 15 The answer is 15.
    Full step-by-step solution

    Step 1: Add the first two numbers: 6 + 5 = 11 Step 2: Add the third number to the result: 11 + 4 = 15 The answer is 15.

  5. Aroha has 3 red balloons, 5 blue balloons, and 1 yellow balloon. How many balloons does Aroha have in all? Answer: 9 Solution: Start with the red balloons: 3 Add the blue balloons: 3 + 5 = 8 Add the yellow balloons: 8 + 1 = 9 Aroha has 9 balloons in all.
    Full step-by-step solution

    Step 1: Start with the red balloons: 3 Step 2: Add the blue balloons: 3 + 5 = 8 Step 3: Add the yellow balloons: 8 + 1 = 9 Aroha has 9 balloons in all.

  6. 7 + 4 + 5 = ? Answer: 16 Solution: Start with the first two numbers: 7 + 4. 7 + 4 = 11. Now take the result from Step 1 and add the third number: 11 + 5.
    Full step-by-step solution

    Let's add the numbers step by step. Step 1: Start with the first two numbers: 7 + 4. 7 + 4 = 11. Step 2: Now take the result from Step 1 and add the third number: 11 + 5. 11 + 5 = 16. Step 3: Check the reasoning: We added 7 and 4 to get 11, then added 5 to get 16. This is correct because addition is done from left to right. Final Answer: 16

  7. 3 + 4 + 2 = ? Answer: 9 Solution: Add the first two numbers: 3 + 4 = 7 Add the third number to the result from Step 1: 7 + 2 = 9 The answer is 9.
    Full step-by-step solution

    Step 1: Add the first two numbers: 3 + 4 = 7 Step 2: Add the third number to the result from Step 1: 7 + 2 = 9 The answer is 9.

  8. A triangle has 3 sides. One side is 5 blocks long, another side is 4 blocks long, and the last side is 6 blocks long. How many blocks are used to make all three sides of the triangle? Answer: 15 Solution: Identify the length of each side: 5 blocks, 4 blocks, and 6 blocks. Add the first two sides: 5 + 4 = 9. Add the third side to the sum: 9 + 6 = 15.
    Full step-by-step solution

    Step 1: Identify the length of each side: 5 blocks, 4 blocks, and 6 blocks. Step 2: Add the first two sides: 5 + 4 = 9. Step 3: Add the third side to the sum: 9 + 6 = 15. The total number of blocks is 15.

  9. Emma has 6 stickers. Her friend Noah gives her 4 more stickers. Then Emma's teacher gives her 3 more stickers for good work. How many stickers does Emma have in total? Answer: 13 Solution: Emma starts with 6 stickers Noah gives her 4 more stickers: 6 + 4 = 10 Her teacher gives her 3 more stickers: 10 + 3 = 13 Emma has 13 stickers in total The answer is 13.
    Full step-by-step solution

    Step 1: Emma starts with 6 stickers Step 2: Noah gives her 4 more stickers: 6 + 4 = 10 Step 3: Her teacher gives her 3 more stickers: 10 + 3 = 13 Step 4: Emma has 13 stickers in total The answer is 13.