Transcript Pan Balance Lesson

Focus: What does
=
(the equal sign) mean?
1. 9 + 9 = 10 + 8
2. 8 x 7 = 50 + 6
3. 10 – 5 = 20 ÷ 4
4. 25 ÷ 5 = 2 + 3
Same
, B alanced
, E qual
How does the number detective’s statement help us with
problems such as these?
1. 9 + y = 10
2. 8m = 56
3. 10 = 5 +
4. ___ ÷ 5 = 5
Use what you
KNOW to help
find out what you
don’t KNOW!
To recap…
•So, the
=
means…. same, balanced, equal
KNOW
•We use what we _________to
help us find what
we don’t ________.
KNOW
•When we think of the word BALANCED, it
makes us think of something from science class…
Check out this Pan Balance Website!
One more time…
•So, the
=
means…. same, balanced, equal
KNOW
•We use what we _________to
help us find what
we don’t ________.
KNOW
•To keep our problems “balanced,” what we do to
ONE
OTHER
_______
side we must do to the _________.
Let’s move on!
Tell me what you already know about what you see.
5
7
=
The first problem was easy because one number was
all by itself. Could we get one of the numbers all
by itself in this problem?
10
7
=
Can we do the same thing here?
5
8
=
Try this with a partner!
7
12
=
Try this one independently!
15
20
=
Now, this looks a little tricky…
20
8
=
Partner
25
4
=
Independently
10
42
=
This one looks different. What should I do?
10
50
30
=
50
Now, let’s try this with a partner!
What did we learn today?
Challenge!
Could we solve this with the balance?
Laura and Hannah are sisters. Laura is 4 years older
than Hannah. The total of their ages is 30. Can you
determine their ages and represent your thinking
with the balance if Hannah’s age is equal to one circle?