Pre-Algebra Chapter Two

Perfect Squares

100

What does it mean to be a perfect square?

It is a number multiplied by itself

200

What is 4^2?

16

300

Is 65 the answer to a perfect square? Why?

No, nothing times itself equals 65. 

400

What is the square root of 25?

5

500

What is 4² minus the square root of 36?

10

Scientific Notation

100

Fill in the blank...…..3.4 x _____³

10

200

Write in scientific notation. 23,000,000

2.3 x 10⁷

300

Write in standard form: 2.4 x 10^-5

0.000024

400

Make this correct:   34.5 x 10⁶

3.45 x 10⁷

500

Make this correct: .34 x 10^-3

3.4 x 10^-4

Operations with Scientific Notation

100

What is the first thing I should do in this problem?

(2.3 x 10⁴)(3.5 x 10⁴)

Multiply the decimals

200

What is the second thing I should do in this problem?

(2.3 x 10⁴)(3.5 x 10⁴)

Add the exponents

300

Solve

(2.3 x 10⁴)(3.5 x 10⁴)

8.05 x 10⁸

400

Solve: 

(45.5 x 10^-4) / (5 x 10⁶)

9.1 x 10^-10

500

(4.2 x 10^-4)(7.8x10⁷)

3.276 x 10⁴

Estimate Square Roots

100

What two whole numbers does the square root of 15 fall between?

3 and 4

200

Do you predict the square root of 10 to be closer to the whole number 3 or 4? Why?

3, because 3²  is 9 and 10 is really close to 9. 

300

Estimate the square root of 10 to the nearest tenth. 

3.1

400

estimate the square root of 72 to the nearest tenth

8.5

500

Estimate the square root of 24 to the nearest hundreth

4.89