Fact Families

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1st Quarter Study Guide
Fact families can be made with three related
numbers. We say they are related because we can
make two true multiplication sentences and two
true division sentences.
Fact Families
See how the numbers 2,8,16 are related.
2 x 8 16 8 x 2 16 These are turn-around
facts. 16 / 2 8 16 / 8 2 Notice how the
quotient and the
divisor trade places.
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1st Quarter Study Guide
Notice that the largest number is always the
product in the multiplication sentence and the
dividend in the division sentence.
Fact Families
See how the numbers 4,6,24 are related.
Product
Product
4 x 6 24 6 x 4 24 24 / 6 4 24 /
4 6
Dividend
Dividend
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1st Quarter Study Guide
The area of a shape refers to the space within
the lines of the shape. Area can be found by
finding the number of square units within a
shape.
Area
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1st Quarter Study Guide
1
2
Area
4
3
5
6
7
8
Area 8 sq units
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1st Quarter Study Guide
Area
Area of a square or rectangle can be found by
multiplying the length times the width.
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1st Quarter Study Guide
Try this.. Find the area of each figure
below. Click on the box to check you answer.
Area
7 inches
20 cm
7 inches
8 cm
Area 20 x 8 160 sq cm
Area 7 x 7 49 sq inches
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1st Quarter Study Guide
The perimeter is the distance around an object.
Perimeter
14 cm
7 cm
7 cm
Perimeter 33cm
5 cm
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1st Quarter Study Guide
Try this.. Find the perimeter of each figure
below. Click on the box to check you answer.
Perimeter
6 cm
14 inches
8 inches
2 cm
4 cm
3 cm
2 cm
14 14 8 8 44 inches
3 cm
6 2 3 2 3 4 20 cm
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1st Quarter Study Guide
An ANGLE is the amount of turning between the two
sides of the angle.
Angles
area of turning
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1st Quarter Study Guide
Angles
Acute Angle Less than 90 degrees
Obtuse Angle More than 90 degrees
Right Angle 90 degrees
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1st Quarter Study Guide
Click on the numbers one through ten to identify
each type of angle.
2
1
3
4
7
8
6
5
10
1. acute
6. acute
9
2. obtuse
7. Right angle
3. Right angle
8. obtuse
9. obtuse
4. acute
5. obtuse
10.obtuse
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1st Quarter Study Guide

• All bar graphs need
• A Title
• Axes labeled with names of the two variables
• Show the values of the variables
• Need a scale that will accurately display the
  data

Bar Graphs
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1st Quarter Study Guide
Bar Graphs
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1st Quarter Study Guide
Point Graphs
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1st Quarter Study Guide
Point Graphs
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1st Quarter Study Guide
Averaging - The Median
An average is a single value that represents a
set of numbers. For example, the average grade
for a student is the one number that is used to
represent all grades in a subject area.
The median is the number exactly in the middle of
a set of numbers.
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1st Quarter Study Guide
To find the median the list of numbers must be
listed in order from small to large.
In a list of numbers where there is an odd number
of values, the exact middle number will be the
median.
Finding the Median
EXAMPLE.. In five basketball games John scores
12, 8, 6, 3, and 15 points. Put these numbers in
order. 3,6,8,12,15
8 is the median because it is the exact middle.
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1st Quarter Study Guide
In a list of numbers where there is an even
number of values, find the two middle numbers and
determine the middle of those two numbers.
Finding the Median
EXAMPLE.. After six quizzes Sara as these score,
18,16,14,20. Put these numbers in order
14,16,18,20 Find the two middle
numbers16,18determine what is exactly in the
middle of those two numbers.
17 is the median
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1st Quarter Study Guide
Try this.. On the first five spelling
tests Tony received these scores.88,91,75,100,78.
What is his median score? Click the
box to reveal the solution.
Finding the Median
75, 78, 88, 91, 100
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1st Quarter Study Guide
Try this.. Terry opens six bags of MMs.
There are 24,33, 22, 18,27,20 MMs in the opened
bags. What is his median score? Click
the box to reveal the solution.
Finding the Median
18,20,22,24,27,33 22 and 24 are the middle two
numbers. 23 is the median because it is exactly
between 22 and 24
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1st Quarter Study Guide
Place value helps to organize our numbers so that
they can be read and understood by
everybody. When we talk about place, we are
asking you to name the place value location of
the number. When we talk about value, we are
asking how much a digit is worth in a particular
place.
Place Value
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1st Quarter Study Guide
______ ______ ______, ______ ______ ______,
______ ______ ______
Ten millions
tens
ones
millions
hundreds
thousands
Place Value
Ten thousands
Hundred millions
Hundred thousands
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1st Quarter Study Guide
Lets look at the number 1,487. We can identify
the place and the value for each digit.
Place Value 1 Thousands 1,000 4
Hundreds 400 8 Tens 80 7 Ones
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Place Value
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1st Quarter Study Guide
One way to remember the difference is that you
will write the place of a number using
words.tens, hundreds.. You will write the value
of a number using numbers.200.. 40 3000
Place Value
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1st Quarter Study Guide
Another way to think about value is to take the
digit and multiply it times the place it is
in.look at this. The number 3,582.the five is
in the hundreds place.so we will multiply 5 x
100 500. The value of the 5 is 500.
Place Value
Ones - 1 Tens 10 Hundreds 100
Thousands 1,000 Ten Thousands 10,000
Hundred Thousands 100,000 Millions 1,000,000
Ten Millions 10,000,000 Hundred Millions
100,000,000
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1st Quarter Study Guide
Factors are two numbers that we can multiply
together to equal a third number.examples
12 18 1 x 12
1 x 18 2 x 6 2 x 9 3 x 4
Factors and Multiples
Multiples is another way of saying counting by.
If you are asked for the first five multiples of
3, you would count by 3 3,6,9,12,15
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1st Quarter Study Guide
Prime numbers only have two factors.the number 1
and the number itself. 7 is a prime number
because the only factors are 7 and 119 is a
prime number because the only factors 19 and 1.
Prime and Composite
Composite numbers are numbers that have more than
two factors. In other words numbers that are not
prime numbers are composite numbers. 12 is an
example of a composite number. It has the
factors.. 1,12,2,6,3,4.
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1st Quarter Study Guide
Square numbers are numbers that can be found by
multiplying a number by itself. 2 x 2 4 4
is a square number 6 x 6 36 36 is a square
number When used as the length and width of a
rectangle, they will be the dimensions of a
square.
They can be written as 6 6 x 6. This
can be read six squared.
Square Numbers
2
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1st Quarter Study Guide
Prime factors are a series of prime numbers that
when multiplied, will equal a given number. We
find these prim numbers by creating factor trees.
Prime Factors
24
8
3
4
2
2 x 2 x 2 x 3 24
2
2