Integers
How do we add integers of the same sign?
Add the 2 numbers
Apply the correct sign (Both + = +, Both - = -)
What must we have in our fractions to be able to Add them together?
A common denominator
What do we need to do with the decimals AND the number of digits to solve decimal problems?
Line up the decimals and have the same number of digits (Add Zeros)
A graph is proportional if it does what TWO things?
(HINT: NEED TWO ANSWERS)
Straight Line
Through (0, 0)
Adding a NEGATIVE and a NEGATIVE gives you?
Always A Negative Answer
How do we add integers of different signs?
Ignore the signs
Big MINUS Small
Apply sign of the Big
Solve the following problem:
3/2 + (-4/2)
-1/2
Solve the following problem:
-1.05 + (-2.36) =
-3.41
(REMEMBER THE NEGATIVE)
Solve the following proportion:
4/7 = x /21
x = 3
(USE BUTTERFLY)
Adding a POSITIVE and a POSITIVE gives you?
Always a Positive Number
-10 + (-7) =
-17
What is the common denominator that we can use to solve this problem:
3/4 + (-5/16)
4 xx4 = 16
Solve the following problem:
3.44 + (-5.34) =
-1.90
How do you find the constant of proportionality (slope) in a table?
Take all y-values and divide them by their x-values, besides x = 0.
Adding a POSITIVE and a NEGATIVE gives you?
Sometimes Negative or Positive (It depends on what we have more of)
-12 + 14 =
+2
Solve the following problem:
-2/3 +(-1/6)
-5/6
Solve the following problem:
-3.24 + 7.8 =
4.56
Is this table proportional:
X Y
1 3
2 6
3 9
Yes, the constant is 3.
What happens when I add a number with its opposite?
Ex: -1 and 1
You get 0 as the answer.
17 + (-21) =
-4
Solve the following problem:
-1/3+2/5
1/15
Solve the following problem:
- 4.53 + (-6.219) =
-10.749
Can a graph be curved and still be proportional?
No, it must be straight
What is the last digit of the answer of :
5 x 5 x 5 x 5 x 5
3125 is the answer, so 5.