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Classroom · Multi-digit multiplication · 3rd and 4th grade

Multiplying by 10 and 100 worksheets

A free five-page pack for 3rd and 4th grade: learn to multiply by 10, 100 and multiples of 10, with a worked example, practice pages, word problems and an answer key.

Download the multiplying by 10 and 100 pack(5 pages, color)Ink saver (B&W)

Watch it solved

59 sec · with voice and captions

A pencil works one example of each activity, so you can see how the worksheet goes before you print it. Tap a step to jump to it. The rest of the sheet is left for your child to finish.

Read what the video says
  1. 0:00 Let's practice multiplying by 10 and 100, step by step.
  2. 0:05 Use the basic fact, then count the zeros. 4 × 3 = 12, so 4 × 30 = 120, and 4 × 300 = 1,200.
  3. 0:18 7 × 200. The basic fact is 7 × 2 = 14. Then add 2 zeros: 1,400.
  4. 0:28 Solve in columns. 7 × 200 = 1,400.
  5. 0:35 Complete the pattern: 3, 30, 300, 3,000. Each zero makes the number ten times bigger.
  6. 0:44 Word problems. A box holds 50 crayons. How many crayons are in 10 boxes? The answer is 500.
  7. 0:53 Great job! Now print the free worksheet, and finish the rest on your own.

How to do it

Use the basic fact, then count the zeros. 4 × 3 = 12, so 4 × 30 = 120 and 4 × 300 = 1,200. Each zero moves the digits one place to the left.

Teaching tip

Show it with place value: 4 groups of 3 tens is 12 tens, which is 120. Children then see why the zero appears, rather than just adding one.

Try some

  • 7 × 200Tap to check
  • 9 × 50Tap to check
  • 8 × 500Tap to check
  • 7 × 500Tap to check
  • 4 × 30Tap to check
  • 6 × 80Tap to check
  • 9 × 60Tap to check
  • 3 × 90Tap to check

Word problems

A box holds 50 crayons. How many crayons are in 10 boxes?Show answer

500

Zara earns 3 stickers a day. How many stickers in 100 days?Show answer

300

A bus drives 40 miles each day. How far does it go in 5 days?Show answer

200 miles

A farm sells apples in bags of 30. How many apples are in 3 bags?Show answer

90

What the worksheets look like

Multiplying by 10 and 100 worksheet: how it works, then area models
Page 1: how it works, then area models
Multiplying by 10 and 100 worksheet: multiply in columns
Page 2: multiply in columns

Area model template

Blank area models to split any multiplication into easy parts.

Template(1 page, color)Ink saver (B&W)

Common questions

How do you teach multiplying by 10 and 100?

Use the basic fact, then count the zeros. 4 × 3 = 12, so 4 × 30 = 120 and 4 × 300 = 1,200. Each zero moves the digits one place to the left. Show it with place value: 4 groups of 3 tens is 12 tens, which is 120. Children then see why the zero appears, rather than just adding one.

What grade learns multiplying by 10 and 100?

Usually 3rd and 4th grade. In the Common Core it is part of 3.NBT.A.3, 4.NBT.A.1.

Is there an answer key?

Yes. Page 5 has every answer from the pack and a short teaching tip.