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Lesson 1: Use place value disks to represent two-digit by one-digit multiplication. — Practice Questions

  1. 1. To find the product of $3 \times 25$, you first multiply the ones, then the tens, and add the results after regrouping. What is the final product? ___

  2. 2. When calculating $5 \times 14$, what is the result of multiplying the ones place, and how should it be regrouped?

    • A. 20 ones, regrouped as 2 tens and 0 ones
    • B. 9 ones, no regrouping needed
    • C. 20 ones, regrouped as 1 ten and 10 ones
    • D. 4 ones, no regrouping needed
  3. 3. Calculate the product by multiplying the ones and tens separately and then adding them: $4 \times 41 = $ ___.

  4. 4. To find the product of $6 \times 32$, you calculate partial products. What are the two partial products you find before regrouping?

    • A. 2 ones and 3 tens
    • B. 12 ones and 18 tens
    • C. 6 and 32
    • D. 12 and 180
  5. 5. A baker makes 5 batches of 24 cookies. How many cookies does the baker make in total? $5 \times 24 = $ ___.

  6. 6. When computing $2 \times 65$, after multiplying and regrouping, you have 0 ones and 13 tens. What is the final product?

    • A. 13
    • B. 310
    • C. 130
    • D. 103
  7. 7. Use the method of multiplying ones and tens separately to find the product. $7 \times 13 = $ ___.

  8. 8. When calculating $3 \times 46$, you multiply $3 \times 6 = 18$. What is the correct next step for the 1 ten from 18?

    • A. It is added to the product of the tens place.
    • B. It is ignored.
    • C. It becomes the final digit in the tens place.
    • D. It is multiplied by 3.
  9. 9. When multiplying $5 \times 32$ using partial products, what is the first partial product from multiplying the ones? ___

  10. 10. When solving $4 \times 41$ using partial products, what is the partial product from multiplying the tens? ___