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### Course: Arithmetic>Unit 14

Lesson 1: Multiply with multiples of 10, 100, and 1,000

# Strategies for multiplying multiples of 10, 100 and 1000

Learn the strategy of estimating in multi-digit multiplication. Watch how to multiply numbers expressed in hundreds, thousands, or tens. Practice this skill by multiplying numbers together and estimating the result, reinforcing their understanding of place value and multiplication.

## Want to join the conversation?

• I like the way he teaches us! its easy and very helpful! and makes me like math better! :)
• I have an A+ in math. P.s, I have 4 A+'s
(1 vote)
• Hi. I just started 5th grade and I don't get where to put the apostrophe. Can someone help me? Thank you.
• For every 3 digits you put an apostrophe, like this: 1,000.
• Hi!

I'm Soha and i am in fith grade. I fail every subject in my grade and i need help. Everyone calls me "Dumb". And that's right i am dumb.
• No you are not!
• i like the way how teaches us it makes me inspired to go to college and learn :)
• How many braincells do i have now
• well i have a couple
• You times the first number and then add the 0s together
800x400:
8x4=32
00+00=0000
32+0000=320,000
• Who even invented decimals in the world.
• how do this chat thing work?
• the way you just used it right now and you can read the comments and that's it
• cant you just do for 50x50 50+50+50+50+.................

................50= 2,500?