Unit 2, Day 4

Agenda

1. Number talk: Number Strings — halves in the exponent this time
2. Random groups — the laws insist $4^{1/2}\times 4^{1/2}=4$: so what number is $4^{1/2}$?
3. Consolidate: Rational Exponents — roots were exponents all along
4. Check your understanding — integer and rational exponents mixed, no calculator until the final step

Things to do before our next class

• Journal: why $27^{1/3}$ had no choice but to be $3$.