squares and square roots

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Slide 1:

SQUARES AND SQUARE ROOTS

Slide 2:

When you raise a number to the second power, we say you “squared” that number. Ex: 4 ² = 4(4) = 16 9² = 9(9) = 81 12² = 12(12) = 144 Squares

Slide 3:

Square Roots If a ² = c, then = a A square root of a number is the number that you can square to get it; that is, a number that you can multiply by itself to get the number. So 2 is a square root of 4, because 2 2 =4 and 3 is a square root of 9, because 3 2 =9.

Slide 4:

Find each square root: √9 √16 √1 √4 √64 √0 √49 √144 √100 √36 = 3 = 4 = 1 = 2 = 8 = 0 = 7 = 12 = 10 = 6

Slide 5:

A perfect square is a whole number that’s been squared. The square root of a perfect square is a whole number. FYI:

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Rounding square roots When square roots don’t work out evenly, we will round to the nearest TENTH . Use your calculator to find each square root to the nearest tenth…

Slide 7:

√55 √23 √5 √14 √44 = 7.4 = 4.8 = 2.2 = 3.7 = 6.6 √8 √71 √56 √2 √31 = 2.8 = 8.4 = 7.5 = 1.4 = 5.6 Copy on scrap paper and try these with your calculator:

Slide 8:

4 2 9 3 16 4 25 5 36 6 49 7 64 8 81 9 100 10 x ² The square root of 42 falls between which two whole numbers? The answer for √42 is between 6 and 7

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