Transcript The 6, 3, 9 Family

Fact Family – A group of facts that are
a family and share the same
numbers
Fact Families for addition and
subtraction.
The 6, 3, 9 Family
6+3=9 3+6=9
9-6=3 9-3=6
Relationship
The situation or fact of being related;
connected or associated.
Model
• An example that
stands for an idea.
How Much?
How Many?
• Asking for an amount or
quantity
• If Sally fed each bird 2
slices of bread. How
many slices of bread did
she feed all of the birds?
Addition
Add
• Joining or
combining together
Count On
• Begin with the largest
number and count on
up until you have used
up all of the smaller
number.
Doubles
• These are "easy"
to learn because
the number is just
doubled.
• 1 + 1 =2
• 2+2=4
• 3+3=6
• 4+4=8
Sum
• The total or whole amount when 2 numbers
are combined.
• 6
+ 4=
sum
10
Join
Put Together
• Combining two or
more numbers.
• The man walked
two barking dogs
and two quiet
dogs. How many
dogs did he walk
in all?
Plus
Plus Sign
Plus: to increase by the
adding two numbers.
4+3=7
Plus sign: Used to show
addition.
Total
In All
Altogether
• The whole amount,
• The whole amount of two
numbers added together
• 2 adults and 3 children
went rollerblading.
The total number of
people rollerblading
was 5.
Equal
two things with the same
value or amount
The pickup truck and the car
have an equal number of wheels.
An equation or a
comparison
equation
comparison
Plus Zero
• Zero added to any
number will always
equal that number.
• If you have 5 pieces
of gum, and I don't
give you any more,
how many pieces of
gum do you have?"
Plus One
• Plus One facts
are just adding
one more
• Two friends were
having lunch 1
friend joined
them. How many
friends ate lunch
together?
Plus Two
• Plus Two facts are
just two more than
the number being
added to two.
• Five apples are in
the basket. Two
apples are outside
of the basket. How
many apples are
there in all?
Doubles Plus One
• For “neighboring” numbers,
double the smaller
number and add one.
5
• 5+6=
• 5+5+1=
6
Doubles Plus Two
• For two numbers that
are two apart, double
the smaller number
and add two.
7
5
• 5+7=
• 5+5+2=
Ten Facts
• Numbers when added
together equal ten.
•
•
•
•
•
1+9=10
2+8=10
3+7=10
4+6=10
5+5=10
6+4=10
7+3=10
8+2=10
9+1=10
4 apples in the bowl plus 6 apples in the
tree equal a total of 10 apples.
Pattern – The repetition of numbers
or objects; list of numbers
that follow a rule
____
3, 6, 9, 12, __, 18
What comes next in the pattern?
Subtraction
Subtract
The action of taking away or comparing groups.
X
X
Minus Sign
Difference
• The amount by which one quantity
is greater or less than another.
There are 3 women
and 2 men.
What is the
difference between
the number of
women and men?
Equal
two things with the same
value or amount
The pickup truck and the car
have an equal number of wheels.
Take Away
• Taking away will
make the larger
number smaller.
• There were eight
pieces of candy in a
box. One fell out.
How many pieces of
candy were left in the
box?
Separate
• Separating a smaller
amount from the
larger number will
reduce the larger
number.
• 7 cars were on the
highway. Then 2 of
the cars were in an
accident. How many
cars were not in the
accident?
How Much More?
How Many More?
• Comparing two amounts
and finding the difference.
• The larger amount will be
that much greater.
• The lion did 3 tricks. The
tiger did 1 trick. How
many more tricks did the
lion do than the tiger?
How Many Fewer ?
How many less?
• Compare the amounts
and find the
difference.
• The smaller amount
will be that much less.
• How many fewer
children are there
than adults?
equation
Minus Sign
Take Away Zero
• Zero taken away
from any number
will always equal
that number.
• If you have 3 pieces
of candy, and you
don't give any away.
How many pieces of
candy do you
have?"
Take Away One
• One taken away from
any number will be one
less than that number.
• 4 friends were running
along the beach. 1 ran
into the water. How
many did not run into
the water?
Take Away Two
• Plus Two facts are
just two more than
the number being
added to two.
• Six cookies were on
the plate. Santa ate
two. How many
cookies were left?
Count Down
• Begin with the largest
number and count
back until you have
used up all of the
smaller number.