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DO NOW
DO NOW
Evaluate the following expressions on scratch paper without a calculator:
Evaluate the following expressions on scratch paper without a calculator:
Those are square root symbols even though the line doesn't extend over the top
- √25 =
- √9 =
- √121 =
- √85 =
LEARNING TARGET
LEARNING TARGET
I can evaluate square roots of perfect squares, and estimate other square roots.
I can evaluate square roots of perfect squares, and estimate other square roots.
I DO
I DO
How do you find square roots of perfect squares?
How do you find square roots of perfect squares?
Keep this somewhere safe. you will probably need it this year.
Keep this somewhere safe. you will probably need it this year.
Where are people keeping things? If you don't have a system for doing that yet, maybe you can borrow an idea from someone else that you think might work for you.
How do you estimate other roots?
How do you estimate other roots?
STEP 1: Find the two perfect squares on either side of the number you're estimating
STEP 1: Find the two perfect squares on either side of the number you're estimating
STEP 2: The answer is between the square roots of those two numbers
STEP 2: The answer is between the square roots of those two numbers
STEP 3: Estimate a decimal answer based on which number it's closer to
STEP 3: Estimate a decimal answer based on which number it's closer to
WE DO
WE DO
YOU DO
YOU DO
Do these problems for a 4 (do what's inside the root first, then do what's outside)
Challenge Work for a 5
EXIT TICKET
EXIT TICKET
Can you estimate this root?:
Can you estimate this root?:
√2600
√2600
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