Free worksheets · Grade 3
Multiplying by Multiples of 10 Worksheet
Multiply a one-digit number by 20, 30, 40 and so on, using the fact you already know.
Free printable
Multiplying by Multiples of 10
36 questions, one page, US Letter. Print it and do it on paper.
On the sheet: Cover the zero and multiply the digits that are left (for 4 × 60, think 4 × 6). That answer is a number of tens. Put the zero back on the end to write the answer.
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About this worksheet
7 × 40 is 7 × 4 tens: 28 tens, which is 280. Multiplying by a multiple of 10 is a basic fact with a zero on the end.
Third graders learn why the zero is there, not just that it is: 4 tens is 40, so 7 groups of 4 tens is 28 tens. That understanding carries them into multiplying bigger numbers in fourth grade.
A worked example
5 × 70 =
- Cover the zero: 5 × 7 = 35.
- That is 35 tens.
- Put the zero back: 350.
Answer: 350
The common mistake
What it looks like: Dropping or doubling the zero: 6 × 50 written as 30 or 3,000.
Why it happens: Children memorize "add a zero" without knowing why, so they lose track of how many zeros belong.
How to fix it: Say it in tens: 6 × 5 tens is 30 tens, and 30 tens is 300.
Ten minutes a day, on paper. We plan what comes next.
A printed page and a pencil. No screen, no login for your child. Snap a photo when they’re done: AI scores it, and what they missed comes back on the sheets that follow.
- Mon Multiplying by Multiples of 10
- Tue What they missed, back again
- Wed The next step, when they’re ready
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