Understanding Multiplying By 10s - Solve Each Problem - Answer Key

Sep 30, 2026

Uploaded by Dipper

Worksheets on multiplying numbers by 10s through repeated two-part word problems. Each item sets a base multiplication (such as 9 × 5 = 45) and asks for the corresponding product when one factor is multiplied by 10 (e.g., 90 × 5). Includes an answer key listing correct results for 20 problems and a scoring-style output shown in a grid format. Suitable for practice, review, and quick assessment of place-value multiplication patterns.

LanguageEnglish

CategoryExam

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Solve each problem

Items 1-20 with multiplication by 10s

Answer key

Understanding Multiplying By 10s Name: Solve each problem. 1) If 9 × 5 = 45 , then 90 × 5 = 2) If 5 × 5 = 25 , then 50 × 5 = 3) If 4 × 8 = 32 , then 40 × 8 = 4) If 2 × 5 = 10 , then 20 × 5 = 5) If 6 × 3 = 18 , then 60 × 3 = 6) If 5 × 10 = 50 , then 50 × 10 = 7) If 1 × 1 = 1 , then 10 × 1 = 8) If 5 × 9 = 45 , then 50 × 9 = 9) If 2 × 4 = 8 , then 20 × 4 = 10) If 1 × 4 = 4 , then 10 × 4 = 11) If 5 × 6 = 30 , then 5 × 60 = 12) If 6 × 2 = 12 , then 6 × 20 = 13) If 6 × 7 = 42 , then 6 × 70 = 14) If 10 × 6 = 60 , then 10 × 60 = 15) If 3 × 3 = 9 , then 3 × 30 = 16) If 4 × 7 = 28 , then 4 × 70 = 17) If 3 × 2 = 6 , then 3 × 20 = 18) If 6 × 4 = 24 , then 6 × 40 = 19) If 4 × 1 = 4 , then 4 × 10 = 20) If 10 × 9 = 90 , then 10 × 90 = 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Answers Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 7 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Understanding Multiplying By 10s Name: Answer Key | Solve each problem.
1) If 9 × 5 = 45 , then 90 × 5 = 450
2) If 5 × 5 = 25 , then 50 × 5 = 250
3) If 4 × 8 = 32 , then 40 × 8 = 320
4) If 2 × 5 = 10 , then 20 × 5 = 100
5) If 6 × 3 = 18 , then 60 × 3 = 180
6) If 5 × 10 = 50 , then 50 × 10 = 500
7) If 1 × 1 = 1 , then 10 × 1 = 10
8) If 5 × 9 = 45 , then 50 × 9 = 450
9) If 2 × 4 = 8 , then 20 × 4 = 80
10) If 1 × 4 = 4 , then 10 × 4 = 40
11) If 5 × 6 = 30 , then 5 × 60 = 300
12) If 6 × 2 = 12 , then 6 × 20 = 120
13) If 6 × 7 = 42 , then 6 × 70 = 420
14) If 10 × 6 = 60 , then 10 × 60 = 600
15) If 3 × 3 = 9 , then 3 × 30 = 90
16) If 4 × 7 = 28 , then 4 × 70 = 280
17) If 3 × 2 = 6 , then 3 × 20 = 60
18) If 6 × 4 = 24 , then 6 × 40 = 240
19) If 4 × 1 = 4 , then 4 × 10 = 40
20) If 10 × 9 = 90 , then 10 × 90 = 900 | Answers
1. 450 2. 250 3. 320 4. 100 5. 180 6. 500 7. 10 8. 450 9. 80 10. 40 11. 300 12. 120 13. 420 14. 600 15. 90 16. 280 17. 60 18. 240 19. 40
20. 900 | | --- | --- | Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 7 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Understanding Multiplying By 10s Name: Solve each problem. 250 320 500 180 300 100 40 10 450 80 120 420 450 1) If 9 × 5 = 45 , then 90 × 5 = 2) If 5 × 5 = 25 , then 50 × 5 = 3) If 4 × 8 = 32 , then 40 × 8 = 4) If 2 × 5 = 10 , then 20 × 5 = 5) If 6 × 3 = 18 , then 60 × 3 = 6) If 5 × 10 = 50 , then 50 × 10 = 7) If 1 × 1 = 1 , then 10 × 1 = 8) If 5 × 9 = 45 , then 50 × 9 = 9) If 2 × 4 = 8 , then 20 × 4 = 10) If 1 × 4 = 4 , then 10 × 4 = 11) If 5 × 6 = 30 , then 5 × 60 = 12) If 6 × 2 = 12 , then 6 × 20 = 13) If 6 × 7 = 42 , then 6 × 70 = Answers 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Math Modified [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 7 1-10 11-13 92 15 85 77 8 0 69 62 54 46 38 31 23

FAQs

What does each problem ask you to do?

Each problem gives a first multiplication and then asks for the matching product after increasing one factor by 10.

How many problems are included in the worksheet?

The worksheet contains 20 problems.

Where can the correct results be found?

The document includes an “Answer Key” section listing the correct answers for problems 1–20.

Sep 30, 2026

Uploaded by Dipper