Number Sense

The Real Numbers

100

Counting numbers are also called...

Natural Numbers

200

Real Numbers are divided into 2 main sets:

Rational and Irrational Numbers

300

Rational Numbers are rational because they can be expressed as __________

Ratios (fractions)

400

Zero is rational but not a _____________ number.

Natural Number

500

All Irrational Numbers have these two 'non" characteristics.

non-repeating and

non-terminating.

Compare & Order

100

Numbers that are ordered from greatest to least are __________

descending

200

Numbers ordered from least to greatest are ___________

ascending

300

Order the following in ascending order:

–1/2, 0.35, –0.75, 3/5

-0.75, -1/2, 0.35, 3/5

400

Which number makes this sentence true?

3² >   __________   >   165%

sqrt(11), 18/6 , 1 1/2

18/6

500

Put these numbers in descending order:

sqrt(400)

5²

3.21 x 10²

3.21 x 10²

5²

sqrt(400)

Classify Numbers

100

3/4

Rational, Real

200

sqrt(56)

Irrational and Real

300

–8

Integer, Rational, Real

400

{4, 7, 18/2, 0}

Whole, Integer, Rational, Real

500

–6.4

Rational, Real

Perfect Squares

100

Which numbers are perfect squares?

0, 1, 2,  4, 6, 9, 12, 14, 16

1, 4, 9, 16

200

9²

81

300

DAILY DOUBLE

If a square garden has an area of 225 square feet, what is the perimeter of the garden?

60 feet

400

16²

256

500

18²

324

Roots

100

What is the name of this symbol?

sqrt

Square Root (or Radical Sign)

200

What are the two square roots of 25?

5, -5

300

Square roots and Perfect squares have an ___________ relationship

Inverse (or opposite)

400

These roots are always rational.

perfect squares

500

All non-perfect square square roots belong to this subset of the Real Numbers.

Irrational Numbers