Place value and large numbers — up to trillions (6th grade math)
In this video, I teach the basics of place value and large numbers with up to 15 digits. We group the digits of large numbers in groups of three, called periods. So, a number might have a trillions period, billions period, millions period, thousands period, and ones period.
A large number can be written in expanded form, which means writing it as a sum of its "parts". It's easiest to write these sums using powers of ten.
In this second part, we look at the writing a large number in expanded form, and do some comparisons between large numbers.
See also
Exponents — video lesson
Math Mammoth Grade 6 curriculum
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