Multiplication
-7 X (-4) =
28
40/-8 =
40 ÷ -8 = -5
-8 + 17 =
9
Nicki scored 20 points. Then she lost 10 points on one turn and also lost 25 points on her last turn. What was Nicki's final score? (negative numbers are okay)
20 - 10 = 10 10 -25 = -15
MULTIPLICATION AND DIVISION INTEGER RULE
Same sign =
Different sign =
Same sign = positive
Different sign = negative
What is the PRODUCT of 5 and -8?
5 X -8 = -40
-55 ÷ (-11) =
5
-25
Which 1 expression is equivalent to -13?
A. -7+5 B. -5-7 C. 5-7 D. 7 + (-5)
B. -5 - 7 = -12
ADDITION AND SUBTRACTION INTEGER RULE
Same sign:
Different signs:
Same signs: add, keep the sign
Different signs: subtract, carry the sign of the bigger number
-5/8 X (-1 3/8) =
-5/8 X -11/8 = 55/64
-4/5 ÷ 2 1/3 =
-4/5 ÷ 7/3
-4/5 X 3/7 = -12/35
23 - (-2) =
Money Problem $$
23 + (+2) = 25
The temperature yesterday in Cincinnati, Ohio, was -6. The temperature today in Cincinnati is 6 WARMER. What is the temperature today?
-6 + 6 = 0
When is keep, change, flip used? (FRACTIONS)
1. Multiplication 2. Division
3. Addition 4. Subtraction
2. Division
17.50 X 3 = A
305 - A =
17.50 X 2 = 22.50
305 - 22.50 = 282.50
8⟌7 = .875
6 2/5 + (-3/10) =
32/5 + -3/10
320/50 + (-15/50) = 305/50
A. -3 + 6 B. -3 - 6 C. 3 - 6 D. 6 + (-3)
B. -3 -6
What do you need to do first when a fraction looks like
3 1/2
Turn it improper. Multiply the bottom by the middle, add the top. Keep the denominator the same
3 1/2 = 7/2
-3/11 X (-1 2/5) =
-3/11 X -7/5
21/55
-7/9 ÷ 3 1/2 =
-7/9 ÷ 7/2
-7/9 X 2/7
-14/63
-1 3/8 - 1/3 =
-11/8 - 1/3
-33/24 - 8/24
-41/24
Which 2 expressions are equivalent to the distance between -13 and -4?
A. |-13 + (-4)| B. |-4 - (-13)| C. |-13-4|
D. |-4 + (-13)| E. |-13 - (-4)|
MONEY PROBLEMS
B. |-4 - (-13)| |-4 + (+13)| |9| 9
E. |-13 - (-4)| |-13 + (+4)| |-9| 9
What do you need to find FIRST for ADDING AND SUBTRACTING FRACTIONS?
COMMON DENOMINATORS