Rational Numbers

Add

100

5+(-9)

-4

200

1/2 + -1/2

0

300

What is the same about adding, subtracting, multiplying, and dividing rational numbers?

The rules are the same!

400

3 + 1 1/2

4.5

500

1/2 + (-3/4)

-1/4

Subtract

100

-12- (-9)

-3

200

10/9 - 1/3

0.778

300

-14 - 22

-36

400

65 -(-14)

79

500

24 3/8-(-54 1/8)

78 1/2

Multiply

100

-5 x 20

-100

200

(-2/3) (-1/2) (-3/5)

-1/5

300

5(-2/3)

3.333

400

What is a rational number?

A number that can be expressed as a fraction.

500

In one day, 15 people each withdrew $100 from a banking machine. What was the overall change in the amount of money in the ATM machine?

-1500

Divide

100

-1/2 divided by 3/4

0.66666

200

2/4 ÷ 2/3

0.83333 

300

14/-7

-2

400

-4/5 divided by -2/3

1.2

500

How do you use "Keep, Change, Flip?"

Exactly how the name says; Keep the first numbe=, change to multiplication, an use the reciprocal of the last number.