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Lesson 1: Multi-digit multiplication estimation

# 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 agree it is super helpful how he teaches!
(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!
• After watching this video things are much clearer😃
• how do this chat thing work?
• You times the first number and then add the 0s together
800x400:
8x4=32
00+00=0000
32+0000=320,000
• why do we need the zeros
• just for the heIp
• What is the current biggest number that has been invented
• Googolplex
A Googolplex is considered to be the biggest number in the world. It is written as 10googol. The number 10googol can also be expressed in the exponential format that will equal 1010^100.
• No matter how hard I try I just cannot understand this