← Back to Multiplying by Multiples of 10

Multiplying by Multiples of 10 - Worksheet 9 - 3rd Grade

Hard

Multiply single-digit numbers by multiples of 10 (Hard)

30 problems · 10-15 minutes · Skills: multiplication, place value

About This Worksheet

This hard-level worksheet contains 30 problems designed for 3rd Grade students practicing multiplying by multiples of 10. Hard worksheets feature challenging problems including multi-step questions, missing values, and real-world applications to push students further.

Multiplying by multiples of ten bridges single-digit multiplication to multi-digit multiplication. It also deepens place-value understanding by showing how multiplication "shifts" digits left — a concept that reappears in scientific notation and decimals.

  • Multiply any single-digit number by 10, 20, 30, ... 90
  • Use place value to understand why 4 × 30 = 120
  • Solve mental math problems involving multiples of ten
  • Extend patterns to multiply by 100 and 1,000
  • Use multiples-of-ten products to estimate larger multiplication problems

How to Solve: Worked Example

Example Problem: Solve the first problem on the worksheet.
Solution Steps:
  1. Read the problem carefully.
  2. Identify what is being asked.
  3. Use what you know to find the answer.
  4. Check your work.
Answer: See the answer key below
Tip: Take your time and read each problem carefully before answering!
1
20 + 16 =
2
12 + 7 =
3
11 + 5 =
4
13 + 13 =
5
3 + 18 =
6
19 + 16 =
7
17 + 9 =
8
6 + 19 =
9
12 + 15 =
10
13 + 20 =
11
4 + 3 =
12
2 + 10 =
13
6 + 15 =
14
14 + 8 =
15
6 + 18 =
16
8 + 1 =
17
12 + 1 =
18
6 + 8 =
19
19 + 3 =
20
6 + 11 =
21
12 + 3 =
22
9 + 20 =
23
1 + 10 =
24
11 + 15 =
25
4 + 9 =
26
17 + 18 =
27
15 + 15 =
28
15 + 1 =
29
8 + 1 =
30
15 + 1 =

Answer Key

1. 362. 193. 164. 265. 216. 357. 268. 259. 2710. 3311. 712. 1213. 2114. 2215. 2416. 917. 1318. 1419. 2220. 1721. 1522. 2923. 1124. 2625. 1326. 3527. 3028. 1629. 930. 16

Frequently Asked Questions

How do I download this multiplying by multiples of 10 - worksheet 9 worksheet?

Click the "Download PDF / Print" button at the top of the worksheet. You can save it as a PDF or print it directly. The answer key will be on a separate page.

How do I find worksheets at different difficulty levels?

Each subtopic has 10 worksheets: Worksheets 1-3 are Easy, 4-7 are Medium, and 8-10 are Hard. Start with Easy worksheets to build confidence, then progress to harder ones.

What skills does this multiplication worksheet cover?

This worksheet focuses on multiplication, place value. It is designed for 3rd Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

Can I use this worksheet in my classroom?

Yes. All worksheets on K12Worksheets are free for classroom use. You can print copies for your entire class. With 10 worksheets per subtopic at three difficulty levels, you have plenty of options for differentiated instruction and individualized practice.

How many problems are on this worksheet?

This worksheet contains 30 problems. It typically takes 10-15 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.