General Rules
(+) x (+) =
(+) or positive
6 x -4.9
29.4
-16.8 ÷ 4
-4.2
9/10 * (-2/3)
-3/5
-5/6-: 1/6
-30/6 or -5
(+) x (-) =
-
-9.4 x (-4.7)
44.18
6.4 ÷ (-3.2)
-2
-5/8 * (-4/15)
1/6
-4/11-: -2/7
28/22 or 14/11 or 1 3/11
Tell whether the expression is positive or negative without solving.
-3/10 * (-8/15)
positive
-7.2 x 0.1
-0.72
-5.1 ÷ (-1.5)
3.4
-1 1/3 * 7/9
-28/27 or -1 1/27
9/10-:(-1 1/5)
-45/60 or -3/4
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.
2.3 x 8.1
18.63
9.1 ÷ (-2.6)
-3.5
-5/3 * -2/3
10/9 or 1 1/9
-1/6-:1 1/3
-3/24 or -1/8
Tell whether the expression is positive or negative without evaluating.
-6/5-:(-1/2)*6.3
negative
-5.3 x 6.2
-32.86
-1.8 / 0.4
-4.5
-3/5 * 1 2/7
-27/35
-13/8 -: -1/2
13/4 or 3 1/4