Roots Lesson Slides: 7 Slides (8th Grade)

7 Slides • 10 Questions

1

Roots

2

Square Roots

has two equal factors

3

Square Root Examples

$\sqrt{16}$
$\sqrt{\frac{16}{25}}$
$\sqrt{-4}$

4

Poll

What is

\sqrt{81}

?

9

81

27

5

Poll

b² = 100

b = 100

b = 10

b = 50

6

Poll

$\sqrt{x}$ = 5

x = 25

x = 5

7

Cube Roots

$cubed\ root\ of\ -27$
$cubed\ root\ of\ 8$

8

Poll

What is the cubed root of 125?

-5

5

25

9

Poll

The cubed root of -1000

-10

10

-100

10

11

Approximating Square Roots

Find two perfect, consecutive squares that the number is between

12

Estimate

\sqrt{8}

to the nearest integer

The square root of 8 is not a whole number because 8 is not a perfect square.
What two perfect squares is $\sqrt{8}$ between?
$\sqrt{4}$ $<$ $\sqrt{8}$ $<$ $\sqrt{9}$
2 < $\sqrt{8}$ < 3

13

Poll

Estimate

\sqrt{33}

25 < $\sqrt{33}$ < 36

33

5 < $\sqrt{33}$ < 6

14

Poll

Estimate

\sqrt{2}

2

2 and 3

1 < $\sqrt{2}$ < 2

15

Poll

Estimate

\sqrt{83}

81 < $\sqrt{83}$ < 100

9 < $\sqrt{83}$ < 10

16

Poll

Estimate

\sqrt{15}

15

3 < $\sqrt{15}$ < 4

4 < $\sqrt{15}$ < 5

17

Poll

On a scale of 1- 3, how to do you feel about solving problems with roots?

1 - LOST

2 - Still have some questions and need some help

3 - I'm good!

Roots

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