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Multiplication Concept

Grade 3 · Mathematics · Worksheet 2

  1. 13 + 13 + 13 + 13 + 13 = ? × 13 Answer: ______________
  2. A farmer plants tomato seedlings in a rectangular garden bed. The bed has 8 rows with 12 seedlings in each row. How many tomato seedlings are planted in total?
    Answer: ______________
  3. A community garden has 8 rows of tomato plants. Each row contains 15 tomato plants. How many tomato plants are there in total in the garden? Answer: ______________
  4. 20 + 20 + 20 + 20 = ? × 20 Answer: ______________
  5. 12 + 12 + 12 + 12 + 12 + 12 + 12 = ? Answer: ______________
  6. 11 + 11 + 11 + 11 + 11 + 11 = ? Answer: ______________
  7. Noah is organizing a charity bake sale for his school. He needs to make cookie trays for 8 different classrooms. Each classroom will receive a tray with 15 cookies. How many cookies does Noah need to bake in total? Answer: ______________
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Answer Key & Explanations

Multiplication Concept · Grade 3 · Worksheet 2

  1. 13 + 13 + 13 + 13 + 13 = ? × 13 Answer: 5 Solution: Count the number of times 13 is added: 13 + 13 + 13 + 13 + 13 has 5 groups of 13. This repeated addition means 5 × 13.
    Full step-by-step solution

    Step 1: Count the number of times 13 is added: 13 + 13 + 13 + 13 + 13 has 5 groups of 13. Step 2: This repeated addition means 5 × 13. Step 3: So the missing number is 5. The answer is 5.

  2. A farmer plants tomato seedlings in a rectangular garden bed. The bed has 8 rows with 12 seedlings in each row. How many tomato seedlings are planted in total? Answer: 96 Solution: We are told the garden bed has 8 rows and each row has 12 seedlings. We need the total number of seedlings.
    Full step-by-step solution

    We are told the garden bed has 8 rows and each row has 12 seedlings. Step 1: Understand the problem. We need the total number of seedlings. Since there are multiple rows with the same number of seedlings in each row, we can multiply the number of rows by the number of seedlings per row. Step 2: Write the multiplication expression. Number of rows = 8 Seedlings per row = 12 Total seedlings = 8 × 12 Step 3: Perform the multiplication. 8 × 12 can be broken down if needed: 8 × 10 = 80 8 × 2 = 16 Now add: 80 + 16 = 96 Step 4: State the final answer. The farmer planted 96 tomato seedlings in total.

  3. A community garden has 8 rows of tomato plants. Each row contains 15 tomato plants. How many tomato plants are there in total in the garden? Answer: 120 Solution: There are 8 rows of tomato plants Each row has 15 tomato plants To find the total, multiply the number of rows by the number of plants in each row: 8 × 15 Calculate 8 × 15 = 120 There are 120 tomato plants in total
    Full step-by-step solution

    Step 1: There are 8 rows of tomato plants Step 2: Each row has 15 tomato plants Step 3: To find the total, multiply the number of rows by the number of plants in each row: 8 × 15 Step 4: Calculate 8 × 15 = 120 Step 5: There are 120 tomato plants in total

  4. 20 + 20 + 20 + 20 = ? × 20 Answer: 4 Solution: Count the number of times 20 is added: 20 + 20 + 20 + 20 has 4 groups of 20. This repeated addition means 4 × 20.
    Full step-by-step solution

    Step 1: Count the number of times 20 is added: 20 + 20 + 20 + 20 has 4 groups of 20. Step 2: This repeated addition means 4 × 20. Step 3: So the missing number is 4. The answer is 4.

  5. 12 + 12 + 12 + 12 + 12 + 12 + 12 = ? Answer: 84 Solution: We are adding 12 seven times. 12 + 12 = 24 24 + 12 = 36 36 + 12 = 48 48 + 12 = 60 60 + 12 = 72 72 + 12 = 84 Since we added 12 seven times, the total is 84.
    Full step-by-step solution

    Step 1: We are adding 12 seven times. Step 2: 12 + 12 = 24 Step 3: 24 + 12 = 36 Step 4: 36 + 12 = 48 Step 5: 48 + 12 = 60 Step 6: 60 + 12 = 72 Step 7: 72 + 12 = 84 Step 8: Since we added 12 seven times, the total is 84. The answer is 84.

  6. 11 + 11 + 11 + 11 + 11 + 11 = ? Answer: 66 Solution: We are adding 11 six times. 11 + 11 = 22 22 + 11 = 33 33 + 11 = 44 44 + 11 = 55 55 + 11 = 66 Since we added 11 six times, the total is 66.
    Full step-by-step solution

    Step 1: We are adding 11 six times. Step 2: 11 + 11 = 22 Step 3: 22 + 11 = 33 Step 4: 33 + 11 = 44 Step 5: 44 + 11 = 55 Step 6: 55 + 11 = 66 Step 7: Since we added 11 six times, the total is 66. The answer is 66.

  7. Noah is organizing a charity bake sale for his school. He needs to make cookie trays for 8 different classrooms. Each classroom will receive a tray with 15 cookies. How many cookies does Noah need to bake in total? Answer: 120 Solution: Noah needs to make cookie trays for 8 classrooms. Each tray has 15 cookies. To find the total number of cookies, we can think of this as 15 + 15 + 15 + 15 + 15 + 15 + 15 + 15.
    Full step-by-step solution

    Step 1: Noah needs to make cookie trays for 8 classrooms. Step 2: Each tray has 15 cookies. Step 3: To find the total number of cookies, we can think of this as 15 + 15 + 15 + 15 + 15 + 15 + 15 + 15. Step 4: 15 + 15 = 30 Step 5: 30 + 15 = 45 Step 6: 45 + 15 = 60 Step 7: 60 + 15 = 75 Step 8: 75 + 15 = 90 Step 9: 90 + 15 = 105 Step 10: 105 + 15 = 120 Noah needs to bake 120 cookies in total.