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Lesson 1: Multiplying and dividing whole numbers by 10, 100, and 1000

# Multiplying and dividing by 10, 100, 1000

Learn how multiplying and dividing whole numbers by 10, 100, and 1,000 shifts the digits of the number left or right, respectively. Multiplying increases the place value, while dividing decreases it, making the process easier to understand.

## Want to join the conversation?

• Tip Of the day:- Multiply goes left, Divide goes Right. That's a secret for doing the calculation at Sight.
• ts easy just mulitply the number with the other number and add the left over zeros
• why is math so hard they should make it easy plus who made math anyway?
• im k with math
(1 vote)
• its so so so so so hard for sum-reason
• the person that walks up to me on the street: hey you! what is 164 times 1,000?

• can you please explain it better
• this is so easy like legit just add however many zeros to your number for multiplication and subtract some zeros for division it's that easy!
• If the "450" was "451", then when it is divided by 10 the "1" at the end of 451 will be in the decimal tenths(45.1).
• Yes, that is correct. Dividing a number by 10 shifts the decimal point one positive to the left.
• where does the placeholder zero go
• The placeholder 0 goes whenever you move on from multiplying the one to multiplying the ten of the bottom number. For example: 23 x 45. You first do the 5 x 3 and the 5 x 20, then those are what make the first answer which you add to the second number for the complete answer. For the second one, you add the placeholder before doing 40 x 3 and 40 x 20. Then you add the products of each and you get the complete product.
• what are some `equations for multiplying i need to warm up. at `, ` 4:35, and `, nothing works.