General Rules
Multiplying Decimals
Dividing Decimals
Multiplying Fractions
Dividing Fractions
Multiplying and Dividing Rational Numbers
100

(+) x (+) =

(+) or positive

100

-4.4 x (-6.02)

26.488

100

-4.95 ÷ 1.5

-3.3

100

9/10 * (-2/3)

-3/5

100

-5/6-: 1/6

-5

100

9 1/2 divided by 57/60

10


200

(+) x (-) =

-

200

-9.4 x (-4.7)

44.18

200

6.4 ÷ (-3.2)

-2

200

-5/8 * (-4/15)

1/6

200

-4/11-: -2/7

14/11 or 1 3/11

200

3/4 X 0.25

3/16 or 0.1875

300

Tell whether the expression is positive or negative without evaluating.

-3/10 * (-8/15)


positive

300

-7.2 x 0.1

-0.72

300

-15.4 ÷ (-2.5)

6.16

300

-2 3/8*(-1 3/5)

19/5 or 3 4/5

300

9/10-:(-1 1/5)

-3/4

300

-2 1/5 X -5/11

1

400

How is multiplying and dividing rational numbers similar to multiplying and dividing integers?

The same rules for signs of integers are applied to rational numbers.

400

14.5 x 0.75


10.875

400

32.436 ÷ (-4.24)

-7.65

400

-12 * 5/8

-15/2 or -7 1/2

400

-4 1/6-:1 1/3

-3 1/8 or -25/8

400

-3.6 divided by -9/10

4

500

Tell whether the expression is positive or negative without evaluating.

-6/5-:(-1/2)*6.3


positive

500

6 x (-0.05)

-0.3

500

24.75/2.25

11

500

-3/5 * 2 2/7

-48/35 or -1 13/35

500

-1/8-: 6 1/10

-5/244

500

-0.2 X 1/3 ***fractional answer***

2/30 or 1/15