Understand Rational Numbers
The sign of the sum of the expression:
-5 + 9
Positive
Identify the decimal equivalent of 3/5
0.6
Simplify:
4 - (-2)
6
Evaluate
-4+7
3
Bill records a temperature drop of 8 degrees and a second temperature change increasing 4 degrees. What is the total change in temperature after both readings?
-4 degrees
What are the 4 types of Rational Numbers?
Integers
Terminating Decimals
Repeating Decimals
Fractions
Last digit
What is the sign of this product?
-2/3 x (-5/8)
Positive
Find
12 - (-8)
20
Luke plays a game. In order to get to the next level, he needs to score 20 points. He scores 30 points for the gems he finds and -12 points for the hazards he hits.
How many points did he earn?
And did he move on?
18 and no.
Which of these situations represents the opposite of -32?
a. A hiker descends 32 kilometers.
b. A fish is 32 feet below sea level.
c. Josh has a $32 debt.
d. Paula gets a $32 credit.
To add or subtract decimals, the first step is to line up the...
Decimal
Multiply these fractions:
-8/7 x (-3/2)
24/14, 12/7, or 1 5/7
Find the product:
4 x (-2) x (-5)
40
Billie hikes in a canyon. She takes breaks at the rest stations every 1/2 mile that she climbs. If she started at sea level and has hiked up to the third rest station, what is Billie's elevation now?
3/2 miles or 1 1/2 miles above sea level
Debt, loss, drop, descend, and decrease are all words that describe what kind of change in value?
Negative
When adding and subtracting fractions I need to have...
A common denominator
(keeping in mind 1/4 is one quarter or one fourth)
-5, -50/10, 500/-100
Yes
Multiply:
-3.5 and -2.01
7.035
A beekeeper has 150 quarts of honey for sale. He sells an average of 12 1/2 quarts each day. What is the total change in quarts he sold in 5 days?
-62.5 quarts
Describe opposite numbers.
These values are the same distance from zero in opposite directions. (5 and -5 or -1/2 and 1/2)
Multiplying and dividing fractions is easier because...
I don't need a common denominator
Find the product of
-3/4 x (3.4)
-2.55
Divide:
2/5 by -3/4
-8/15
Jeffrey has $2.50 transferred from his checking to his savings account every ten days to help him save for a new phone. How much money will be transferred after 50 days?
$125