Operations Rational Numbers (CRM 1.1)

Multiply Operations With Rational Numbers

100

-0.036 * 0.9 =

=0.0324 

(different signs ... product is negative)

200

7 3/4 * (-15/8)

4 2/15 

300

15/6 * -1.2

- 3

400

3.14 *1 2/5

=

4 99/250

500

 -1 * -8.5

8.5

Divided Operations With Rational Numbers

100

(2/9)÷(4/5)

 5/18 

200

-5/9 ÷ 15

 

 

-1/27

300

 -7 ÷ 4/5

-8 3/4 or -8.75

400

(1/7) ÷ (5/2)

2/35

500

(-2/7) ÷ (4/9)

 

-9/14

Addition Operations With Rational Numbers

100

 8.5 + -3.5

  5

200

 

-3/4 + 7/2

 

11/4 or 2 3/4

300

 2.2 + 4.6

 6.8

400

 8.7 + -7.1

 1.6

500

 

1/10 + 2

 

21/10 or 2 1/10

Subtraction Operations with Rational Numbers

100

 

5/8 - (-7/2)

 

33/8 or 4 1/8

200

 

-7/8-(-5/6)

 

-1/24

300

 1.8 - (-3.7)

 5.5

400

 

7/4 - (-1/2)

 

9/4

500

(-1.82)-(-7.61)

5.79

Operation With Rational Numbers

100

-1/8 * -4

 

 

1/2

200

( 1.6+2) ÷ 2.5 

1.44

300

0.12 ÷ 4x 3=

.09

400

-0.45 ÷ (2/5)

 

 

-9/8 or -1 1/8

500

-5 2/5-8 4/5+15 2/5

 

1 1/5

Decimal/Fraction

100

write 4/5 as a decimal number 

0.8

200

Change 0.4 to a fraction?

Use place value ... 

4/10

300

what is this as a decimal?

17/50 

0.34

400

convert to decimal ..

10/25

0.4

500

convert this fraction to a decimal ... 4/12

0.3333...