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Multiplication Concept

Grade 3 · Mathematics · Worksheet 1

  1. Liam is organizing his trading cards into albums. Each album page holds 8 cards. If Liam has 7 full pages of cards, how many trading cards does he have in total? Answer: ______________
  2. A farmer plants corn in a rectangular field. The corn is arranged in 25 rows, and each row has 40 corn plants. If you visualize this field as a grid with rows and columns, how many corn plants are there in total? Answer: ______________
  3. A rectangular garden is planted with flowers in 15 rows. Each row has 24 flowers. If you visualize this garden as an array of rows and columns, how many flowers are there in total? Answer: ______________
  4. The city library is organizing books for their new children's section. They have 8 bookshelves, and each bookshelf can hold 45 books. How many books can the library display in the children's section? Answer: ______________
  5. 50 × 8 = ? Answer: ______________
  6. 50 × 6 = ? Answer: ______________
  7. 14 + 14 + 14 + 14 + 14 = ? × 14 Answer: ______________
  8. A bakery is preparing for a big community event. They need to bake 24 cupcakes for each of the 6 different elementary school classes that will be attending. How many cupcakes does the bakery need to bake in total? Answer: ______________
  9. The school cafeteria is preparing lunch for the third grade classes. Each class has 24 students, and there are 6 classes in third grade. If every student gets one juice box, how many juice boxes does the cafeteria need to prepare? Answer: ______________
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Answer Key & Explanations

Multiplication Concept · Grade 3 · Worksheet 1

  1. Liam is organizing his trading cards into albums. Each album page holds 8 cards. If Liam has 7 full pages of cards, how many trading cards does he have in total? Answer: 56 Solution: Each album page holds 8 cards. Liam has 7 full pages of cards. We need to find the total number of cards.
    Full step-by-step solution

    Step 1: Understand the problem. Each album page holds 8 cards. Liam has 7 full pages of cards. We need to find the total number of cards. Step 2: Identify the operation. Since each page holds 8 cards and there are 7 pages, we multiply the number of pages by the number of cards per page. Step 3: Write the multiplication. Total cards = 7 pages × 8 cards per page Step 4: Perform the calculation. 7 × 8 = 56 Step 5: State the final answer. Liam has 56 trading cards in total.

  2. A farmer plants corn in a rectangular field. The corn is arranged in 25 rows, and each row has 40 corn plants. If you visualize this field as a grid with rows and columns, how many corn plants are there in total? Answer: 1000 Solution: The problem tells us there are 25 rows of corn plants. Each row contains 40 corn plants. To find the total number of corn plants, multiply the number of rows by the number of plants in each row.
    Full step-by-step solution

    Step 1: The problem tells us there are 25 rows of corn plants. Step 2: Each row contains 40 corn plants. Step 3: To find the total number of corn plants, multiply the number of rows by the number of plants in each row. Step 4: Calculate 25 × 40. Step 5: First, multiply 25 by 4 (which is 100), then multiply that result by 10 because 40 = 4 × 10. So, 100 × 10 = 1000. The total number of corn plants is 1000.

  3. A rectangular garden is planted with flowers in 15 rows. Each row has 24 flowers. If you visualize this garden as an array of rows and columns, how many flowers are there in total? Answer: 360 Solution: The garden has 15 rows of flowers Each row has 24 flowers To find the total number of flowers, multiply the number of rows by the number of flowers in each row 15 × 24 = 360 There are 360 flowers in total.
    Full step-by-step solution

    Step 1: The garden has 15 rows of flowers Step 2: Each row has 24 flowers Step 3: To find the total number of flowers, multiply the number of rows by the number of flowers in each row Step 4: 15 × 24 = 360 Step 5: There are 360 flowers in total.

  4. The city library is organizing books for their new children's section. They have 8 bookshelves, and each bookshelf can hold 45 books. How many books can the library display in the children's section? Answer: 360 Solution: The library has 8 bookshelves Each bookshelf holds 45 books To find the total number of books, we can think of this as repeated addition: 45 + 45 + 45 + 45 + 45 + 45 + 45 + 45 45 + 45 = 90 90 + 45 = 135 135 + 45 = 180 180 + 45 = 225 225 + 45 = 270 270 + 45 = 315 315 + 45 = 360 The library can…
    Full step-by-step solution

    Step 1: The library has 8 bookshelves Step 2: Each bookshelf holds 45 books Step 3: To find the total number of books, we can think of this as repeated addition: 45 + 45 + 45 + 45 + 45 + 45 + 45 + 45 Step 4: 45 + 45 = 90 Step 5: 90 + 45 = 135 Step 6: 135 + 45 = 180 Step 7: 180 + 45 = 225 Step 8: 225 + 45 = 270 Step 9: 270 + 45 = 315 Step 10: 315 + 45 = 360 Step 11: The library can display 360 books in the children's section.

  5. 50 × 8 = ? Answer: 400 Solution: Understand that 50 × 8 means adding 50 eight times 50 + 50 = 100 100 + 50 = 150 150 + 50 = 200 200 + 50 = 250 250 + 50 = 300 300 + 50 = 350 350 + 50 = 400 Since we added 50 eight times, 50 × 8 = 400 The answer is 400.
    Full step-by-step solution

    Step 1: Understand that 50 × 8 means adding 50 eight times Step 2: 50 + 50 = 100 Step 3: 100 + 50 = 150 Step 4: 150 + 50 = 200 Step 5: 200 + 50 = 250 Step 6: 250 + 50 = 300 Step 7: 300 + 50 = 350 Step 8: 350 + 50 = 400 Step 9: Since we added 50 eight times, 50 × 8 = 400 The answer is 400.

  6. 50 × 6 = ? Answer: 300 Solution: We need to multiply 50 by 6, which means adding 50 six times 50 + 50 = 100 100 + 50 = 150 150 + 50 = 200 200 + 50 = 250 250 + 50 = 300 Since we added 50 six times, 50 × 6 = 300 The answer is 300.
    Full step-by-step solution

    Step 1: We need to multiply 50 by 6, which means adding 50 six times Step 2: 50 + 50 = 100 Step 3: 100 + 50 = 150 Step 4: 150 + 50 = 200 Step 5: 200 + 50 = 250 Step 6: 250 + 50 = 300 Step 7: Since we added 50 six times, 50 × 6 = 300 The answer is 300.

  7. 14 + 14 + 14 + 14 + 14 = ? × 14 Answer: 5 Solution: Count the number of times 14 is added: 14 + 14 + 14 + 14 + 14 has 5 groups of 14. This repeated addition means 5 × 14.
    Full step-by-step solution

    Step 1: Count the number of times 14 is added: 14 + 14 + 14 + 14 + 14 has 5 groups of 14. Step 2: This repeated addition means 5 × 14. Step 3: So the missing number is 5. The answer is 5.

  8. A bakery is preparing for a big community event. They need to bake 24 cupcakes for each of the 6 different elementary school classes that will be attending. How many cupcakes does the bakery need to bake in total? Answer: 144 Solution: The bakery needs 24 cupcakes for each of the 6 classes. This means we need to find the total number of cupcakes by calculating 24 + 24 + 24 + 24 + 24 + 24. Calculate 24 × 6.
    Full step-by-step solution

    Step 1: The bakery needs 24 cupcakes for each of the 6 classes. Step 2: This means we need to find the total number of cupcakes by calculating 24 + 24 + 24 + 24 + 24 + 24. Step 3: We can also think of this as 24 multiplied by 6. Step 4: Calculate 24 × 6. Step 5: 20 × 6 = 120 and 4 × 6 = 24. Step 6: 120 + 24 = 144. The bakery needs to bake 144 cupcakes in total.

  9. The school cafeteria is preparing lunch for the third grade classes. Each class has 24 students, and there are 6 classes in third grade. If every student gets one juice box, how many juice boxes does the cafeteria need to prepare? Answer: 144 Solution: There are 6 classes and each class has 24 students. To find the total number of juice boxes needed, we need to find the total number of students.
    Full step-by-step solution

    Step 1: There are 6 classes and each class has 24 students. Step 2: To find the total number of juice boxes needed, we need to find the total number of students. Step 3: We can think of this as adding 24 six times: 24 + 24 + 24 + 24 + 24 + 24 Step 4: 24 + 24 = 48 Step 5: 48 + 24 = 72 Step 6: 72 + 24 = 96 Step 7: 96 + 24 = 120 Step 8: 120 + 24 = 144 Step 9: The cafeteria needs to prepare 144 juice boxes.