Add/Subtract Integers
200+(-25)+(-55)
120
(-1)*(2)*(-40)
80
2.3 + (-1/2) + (-4/5)
1
What is 19/30 as a decimal?
0.6333333...
Is the following statement always, sometimes, or never true:
The absolute value of any rational number is positive.
Always True
-17
[(-4)^2] * (-3)
-48
–3.65 – (–4.2)
0.55
What is 0.45454545... as a fraction in simplest form?
5/11
Paul worked for 40 hours this week. He earned $520. How much does he get paid per hour?
$13
48 - _____ = - 61
109
Evaluate: a^2 * bc
if a = -2, b = 5, and c = -3
-60
(1/3) - (-3/5) + (2/3)
1 and 3/5
What is the rule when dividing by a fraction?
Use KEEP, CHANGE, FLIP
Keep the first number, change to multiplication, and flip the divisor.
What is another name for "reciprocal?"
Multiplicative Inverse
What is the rule when subtracting integers?
Use SMATO, then apply the addition rules
Evaluate (xy)/z + (-x)
if x = 2, y = -10, z = -4
3
-8 and 9/10 - (-6 and 2/5)
-2.5
(2/3) divided by (-7/12)
-8/7 of -1 and 1/7
What vocabulary matches the following definition:
"A number that can be written in the form a/b, where a and b are integers and b ≠ 0."
Rational Number
What is the rule when adding integers?
Same sign, sum (sign stays the same)
Different sign, difference (keep the sign of the number with the larger absolute value)
What is the rule when multiplying integers?
Odd number of negatives, negative product/quotient
Even number of negatives, positive product/quotient
Evaluate c – b if c=1/2 and b = –3.5.
4
Evaluate –xyz
if x = –6.2, y = 0.5 and z=2 and 1/4. Write your answer in simplest form.
6.975 or 39/40
Natasha is making a bookshelf. She began with 120 inches of oak boards. She used 50.75 inches for shelves. She bought 36 and 1/4 more inches of oak boards. She then used 40 and 1/2 inches for the top and 60.5 inches for the sides. How many inches of oak boards does Natasha have left?
4.5 inches