Transcript Spring Break Math Practice


Ratios can be written in the following
ways…
6 to 7
6:7
6/7
What is the ratio of butterflies to flowers?

A proportion compares two different
ratios and shows that they are equal.
8
2
12
3
You can use cross products to determine if
they are equal.
A proportion can be used to find the
missing value in a problem-solving
situation. A variable is a letter that can be
used to represent the missing value.
Pencils are on sale, 3 for 36 cents. How
much money does Elysa need to buy 6
pencils?
1. Set up proportion using pencils:money
2. Multiply cross products
3. Solve equation.

Look at the digit to the RIGHT of the place to
which you are rounding.
› If the digit is 5 or more, increase the rounding
digit by 1
› If the digit is less than 5, leave the rounding digit
the same
› Change all digits to the right to zeros
Round 7,152 to the following places:
Nearest ten:
Nearest hundred:
Nearest thousand:

Round the following to the nearest whole
number!
Agnes and Malcom just moved into a new
apartment. They bought a sofa for
$826.75, a recliner for $372.54, and a TV for
$1,089.67. About how much money did
they spend altogether?

Please refer to the examples in your
packet!
What is the measure of the line segment to
the nearest fraction of an inch?
What is the measure of the line segment to
the nearest centimeter?
What is the exact measure of the line
segment?
9
144 oz =____lb
10,000
5 T = ______lb
40 oz
2.5 lb = ____
1lb = 16 oz
1T = 2,000 lbs
Kg hg dag g dg cg mg
4 g = ___ mg
3.5 kg = ____mg
2,500mg = ____g
500g = ____kg
Mean: The sum of the numbers in a data
set divided by how many numbers there
are in the set.
A bookcase has 5 shelves with 38, 42, 47,
36, and 37 books on them. What is the
mean number of books per shelf?
Median: The middle number in a data set
arranged from least to greatest.
The following list shows the number of
customers who ordered pie at Ma and Pa’s
Diner each day last week.
8, 11, 7, 20, 13, 7, 10
What is the median number of customers
who ordered pies?
Mode: The number that appears most
often in a data set.
Steve played nine holes of golf and shot
the following scores: 4, 5, 4, 6, 3, 7, 4, 5, 4
What is the mode of the scores?
Sample: A set of data taken from a
population (large group) and used to make
predictions about the data as a whole.
Random Sample: Represents as close as
possible the characteristics of the entire
population.
Biased Sample: Does not represent the
entire population.
Biased is Bad!
An automotive company wants to find out
what feature would lead people to buy a
car. Which of the following samples would
best represent the entire population?
A. Survey people that are not interested in
buying a new car.
B. Survey 4 students in each 8th grade math
class at a middle school.
C. Survey every 5th customer that exits a
grocery store.
D. Survey every 10th customer that just
bought a new car.