Transcript Rooms 12 and 13

Are You Ready for Chapter 5?
Lesson 1: Add in Any Order
Lesson 2: Count On 1, 2, or 3
Lesson 3: Problem-Solving Strategy:
Act it Out
Lesson 4: Add 1, 2, or 3
Lesson 5: Use a Number Line to Add
Lesson 6: Doubles
Lesson 7: Doubles Plus 1
Lesson 8: Problem-Solving Investigation:
Choose a Strategy
Chapter 5 Review
Select a hyperlink to go to the corresponding slides.
Circle the symbol that
means to add.
+
–
=
Circle the symbol that
means equals.
+
–
=
Add.
4
+ 0
4
Add.
2
+ 2
4
Add.
7
+ 1
8
Add.
6
+ 3
9
Add.
4
+ 1
5
Add.
3
+ 4
7
Add.
5
+ 2
7
Add.
8
+ 1
9
Add.
9
+ 1
10
Use the pictures to write a
number sentence.
4
+
2
=
6
I will add in any order.
addend
Create an addition problem using
2 blue and 5 red connecting cubes.
What are the two addends?
2 and 5
What number sentence do the
cubes show?
2+5=7
Move the blue cubes to the
other end.
What number sentence do the
cubes show now?
5+2=7
2+5=7
5+2=7
How are the number sentences
different?
The addends are in a
different order.
2+5=7
5+2=7
Did the sum change when we
added in a different order?
no
4+5=9
Which numbers are the addends?
4 and 5
4+5=9
Use counters to show the addition
is correct.
4+5=9
Write a number sentence that
changes the order of the addends.
5+4=9
5+4=9
Use counters to show the new
sentence.
I will count on to add.
count on
3 + 6 = __
Model the problem with
connecting cubes.
3 + 6 = __
What are the addends?
3 and 6
3 + 6 = __
Which number is less?
3
3 + 6 = __
Which number is greater?
6
3 + 6 = __
When you add these numbers by
counting on, which number should
you start from?
6
3 + 6 = __
Why is it easier to begin with the
greater number?
You do not have to count on as
many numbers.
3 + 6 = __
How many cubes will you
count on?
3
3 + 6 = __
9
6
What is the sum?
7
8
9
2 + 5 = __
7
6
7
5
Start with the greater number.
Count on to add.
7 + 3 = 10
__
8
7
Start with the greater number.
Count on to add.
9 10
Start with the greater number.
Count on to add.
3 + 1 = __
4
2 + 5 = __
7
4 + 3 = __
7
I will use models to act out
and solve problems.
49
What do I need to find?
Circle the question.
50
How will I solve
the problem?
Act it out.
51
Should you add or subtract to find
how many cans Marcy collected?
add
How many cubes
should you show for
Sam?
6 cans
How many more
cubes will you
show for Marcy?
4 cans
How many cans did
Marcy collect?
6 + 4 = 10 cans
6 + 4 = 10 
7 8 9 10
6
Look back.
Does my answer make sense?
Carlos has 6 model planes.
His sister gives him 4 more.
How many planes does Carlos
have now?
10 planes
I will add 1, 2, or 3.
Which color has more cubes?
red
3
4
What is the sum?
Start with 3 and then add the
yellow cube.
3+1=4
Why did we begin with the three
red cubes?
3 is the greater number, and
we only had to count on 1
instead of starting with 1 and
counting on 3.
Adding 1 is just finding the next
number.
4 + 2 = __
6
4
5
6
Circle the greater number.
Then count on to add.
3 + 5 = __
8
5
6
7
Circle the greater number.
Then count on to add.
8
Circle the greater number. Then
count on to add.
6 + 2 = __
8
3 + 4 = __
7
5 + 1 = __
6
I will use a number line
to add.
Start at 4.
How many jumps to 7?
3 jumps
Start at 2.
How many jumps to 6?
4 jumps
3 + 7 = __
Use the number line to add.
Which addend is greater?
7
3 + 7 = 10
__
How many will you count on
from 7?
What is the sum?
3
3 + 7 = 10
__
Why is it best to count on from 7?
It is faster to start with the greater number
(7) and count on only 3 than to start with 3
and count on 7.
3 + 7 = 10
__
How does a number line help you find
the sum of two numbers?
You can start at the greater number and point
to the numbers as you count on or add.
Use the number line to add.
2 + 9 = __
11
I will add using doubles.
doubles
3+3=6
Why is this a doubles fact?
The addends are the same.
3+3=6
What is the related
subtraction fact?
6–3=3
3+3=6
6–3=3
How are the number sentences
the same?
They use the same numbers.
3+3=6
6–3=3
How are they different?
One is an addition fact and one
is a subtraction fact.
Find the sums. Circle the
doubles facts.
2 + 2 = __
4
4 + 6 = 10
__
5 + 1 = __
6
5 + 5 = 10
__
0 + 0 = __
0
3 + 4 = __
7
I will add using doubles
plus 1.
doubles plus 1
4 + 4 = __
8
Find the sum using counters.
Add one more counter.
What is the new number sentence?
4+5=9
4+5=9
How is 4 + 5 different from a
doubles fact?
It has one addend (5) that is
greater by 1.
4+5=9
When the addend gets bigger by 1,
what happens to the sum?
It gets bigger by 1, too.
4+5=9
Why is 4 + 5 called a doubles plus
1 fact?
It is a doubles fact with 1 added
to one of the addends.
What doubles fact can be used to
find this sum?
6 + 7 = __
6 + 6 = 12
Find the sum.
6 + 7 = 13
__
Since 6 + 7 is a doubles plus 1
fact, and 6 + 6 = 12, then this
sum is 1 more than 12.
I will choose a strategy to
solve problems.
What do I need to find? Circle it.
How will I solve the problem?
One way is to act it out.
Use a counter for each feather.
How many feathers
does Amy have?
How many feathers
does Bill have?
How many more
feathers does Bill need?
2 feathers
Look back. Does my
answer make sense?
7
+
2
=
9
yes
Choose a strategy. Solve.
Jamal collected
8 sea shells.
His sister collected
3 sea shells.
How many more sea shells does
his sister need to collect to have as
many as Jamal?
5 sea shells
Complete the sentences.
____________
are two addends
Doubles
that are the same number.
____________
are the numbers
Addends
being added together.
addends
doubles
Circle the greater number.
Then count on to add.
1 + 2 = __
3
7 + 3 = 10
__
4 + 2 = __
6
8 + 1 = __
9
Find the sum. Circle the
doubles facts.
3 + 4 = __
7
5 + 5 = 10
__
1 + 1 = __
2
4 + 5 = __
9