Class 3 (CBSE) • MathematicsChapter 9: House of Hundreds – II⭐ Topic 1
Multiplying by Multiples of 10
We learn a quick way to multiply numbers by 10, 20, 30, and other multiples of 10.
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Know it
Step 1 of 3
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See the pattern
Step 2 of 3
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Try it out
Step 3 of 3
Fun picture
Try it now
Learn the idea step by step
1
Know it
To multiply a number by 10, we simply add a zero to the end - for example, 6 x 10 = 60, and 23 x 10 = 230.
Quick revision
Remember these!
- Multiplying by 10 means adding a zero to the number.
- 6 x 10 = 60.
- To multiply by 20, multiply by 2, then by 10.
- 6 x 20 = 120.
- This method works for any multiple of 10.
- This is a useful shortcut for quick multiplication.
- 23 x 10 = 230.
- This shortcut helps with bigger multiplication problems.
Words to know
multiplying by multiples of 10cbse class 3 maths