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Estimating Square Roots Activity for Mental Math Practice

Practice estimating square roots without a calculator. Learn to find approximate sums using close perfect square roots. Try examples and complete the College of Cosmetics worksheet without external aid.

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Estimating Square Roots Activity for Mental Math Practice

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  1. Tuesday January 14, 2014Bell Ringer: Without a calculator, estimate the following sum (HINT: round up or down to create numbers that are easier to add). I DO NOT want an exact answer, NO CALCULATORS and show your work! 567 + 29 + 343 + 148

  2. What We are Learning Today: • To estimate square roots of numbers that are not perfect squares

  3. How to Estimate Square Roots: • Without a calculator: • Find a perfect square root that is close in value to the imperfect square root • If the perfect square is greater than the imperfect square the answer will lie between the perfect square integer and the integer one LESS than it • If the perfect square is less than the imperfect square the answer will lie between the perfect square integer and the integer one GREATER than it

  4. Let’s Try These Together: • √8 • -√39 • ±√60 • √19

  5. Practice Time: • College of Cosmetics Worksheet • Do these WITHOUT a calculator! • Use your Perfect Squares chart

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