What's the Sign?
A positive plus a positive equals a _____________.
(+) + (+) = _______
A positive (+)
1.2
+ 3.3
______
(1.2 + 3.3 =_____)
4.5
2/3 + 1/3 =
3/3
4.6
- 2.1
______
(4.6 - 2.1 = _______)
2.5
3/4 - 2/4 = ______
2/4
A negative plus a negative equals a ___________.
(-) + (-) = _____
A negative (-)
-2.5
+ 3.4
______
(-2.5 + 3.4 = _____).
0.9
-3/8 + (-1/8) =
-4/8
- 3.5
- 5.1
_________
(-3.5 - 5.1 = _____)
-8.6
- 3/9 - 1/9 = ______
-4/9
How do you know what the sign of your answer will be? (positive or negative)
It will be the sign of the bigger number in the original problem.
-12.5
+ 6.2
_________
(-12.5 + 6.2 = _____)
-6.3
-2/7 + (-4/7) =
-6/7
- 12.4
- 5.8
________
(-12.4 - 5.8 = _____)
-18.2
3/6 - (-1/6) = ______
4/6
What does K-C-O stand for?
Keep (K), Change (C), Opposite (O)
8.9
+ -4.2
________
(8.9 + (-4.2) = _______)
4.7
-2/9 + (4/9) =
2/9
10.1
- (-5.5)
________
(10.1 - (-5.5) = _____)
15.6
-9/12 - 4/12 = _____
-13/12
Minus a negative turns into __________ _________.
- (-) = ___ ___ (ex: 2 - (-2) = ____)
Plus a positive + (+)
-8.3
+ -2.5
__________
(-8.3 + (-2.5) = ______ )
-10.8
-4/5 + 2/5 =
-2/5
- (- 9.8)
_______
(12.6 - (-9.8) = _____ )
22.4
7/10 - (-3/10) = _______
10/10