Operations with Rational Numbers

Addition Operations With Rational Numbers

100

-12 + 8

-4

200

 

-3/4 + 7/4

 

4/4 or 1

300

 2.2 + 4.6

 6.8

400

3 + 4 + (-7)

0

500

 

7/8 + 3/4

 

13/8 or 1 5/8

Subtraction Operations with Rational Numbers

100

 

8 - 13

 

-5

200

 

-7/8-(-5/8)

 

-2/8 or -1/4

300

 1.8 - (-3.7)

 5.5

400

 

7/4 - (-1/2)

 

9/4

500

(-1.82)-(-7.61)

5.79

Multiply Operations With Rational Numbers

100

 -1 (-8)

16

200

(0.12)(0.3)=

=0.036

300

15/6(2/3)

30/18 or 5/3

400

3/4 * (-15/2)

-45/8 or -5 5/8

500

3.14 *2.1

=

6.594

Divided Operations With Rational Numbers

100

-80/2

-40

200

-5/9 /15/2

 

 

-10/135 or -2/27

300

0.36/0.006

60

400

(1/7)/(5)

1/35

500

(-2/-7)/(4/-9)

 

-18/28 or -9/14

Conversions

100

Convert to a fraction

0.32323232....

32/99

200

Convert to a decimal

63/100

0.63

300

Simplify then convert to a fraction

3.1 + 4.14

724/100 or 7 24/100 or 7 6/25

400

If potatoes cost $3 per pound and you buy 5 1/2 pounds, how much will that cost?

$16.50

500

Your phone has 3/5 of the battery left. What percentage is this?

60%

PEMDAS

100

4(2-5)

-12

200

(3+5)/2-3*4

-8

300

(5-7)^2+12/-6

2

400

Convert your result into a decimal

2/5(1+1.5)+5.2

62/10 or 6 2/10 or 6 1/5

500

At the market you buy 2.3 pounds of chicken for $4 per pound and

3 1/4

pounds of carne for $6 per pound. How much did you spend in total?

$28.70