Dr. Kat Math Practice

Place Value with Powers of 10

Lesson Page 4, Section 5

What you'll work on

Rewrite expressions with different powers of 10 so the exponents match, then add the coefficients to find the sum.

Big Idea for this lesson

$A painted illustration of two stacks of small wooden blocks of clearly different heights — a short stack on the left and a much taller stack on the right — with a soft painted arrow between them showing the tall stack being broken down into ten smaller stacks each the same size as the short one. Warm scholarly tones, classical-education aesthetic, no text or numbers.$

To add powers of 10, rewrite them so the exponents match — then add the coefficients and keep the shared exponent. It's the same idea as finding a common denominator in fractions.

6 questions · pace yourself · explanations on every answer

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