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Previous Lesson
Check Up
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Review
yesterday's
homework
(optional)
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Cutting Out
Fact Triangles
(If this wasn't done during
previous lesson)
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Activity Sheets 1­ 3
Cut out Activity sheets 1­ 3. Put your initials or class number on the
back of each card and put them in a baggie.
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EVERYDAY MATH LESSON
3.3
Created by:
Brian Salco
Rocky River City Schools
2015
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For today's lesson you will need:
* Dry erase board
* Dry erase marker & eraser
* Math Journal 1
* Pencil
* Math fact triangles
* Quick Look cards 87, 98 and 118
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Mental Math
& Fluency
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Please take out your dry erase
boards, one dry erase marker
and your eraser (sock).
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Here is fun little activity. I am going to show
you an activity card (on the SMART Board) with
some dots on it but you will not have time to
count the dots. You will have 3 seconds to look
at each card. After seeing the card, write down
the number of dots you saw on your dry erase
board. Be ready to share with the class how
you came up with your answer.
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How many dots do you think were on activity
card 87? How did you come up with that
answer?
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How many dots do you think were on activity
card 98? How did you come up with that
answer?
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How many dots do you think were on activity
card 118? How did you come up with that
answer?
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Math Message
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Please take out your math journal 1 workbooks
and a pencil. Turn to page 50.
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Look at the Addition/Subtraction Facts
Table on journal page 50. How does it
show the answers to an addition fact?
Before I demonstrate, see if you can
work with people around you to figure it
out. Be ready to share your answers.
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Exploring Patterns on
the Addition/Subtraction
Facts Table
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What are some patterns you see on the
Addition/Subtraction fact table?
We are now going to practice using the
fact table to solve some problems.
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Problems:
9 + 7 = ?
8 + 5 = ?
6 + 6 = ?
8 + 7 = ?
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Discussing Fact
Families
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Let's come up with a unit for today.
unit
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Now, let's take a look at this fact
unit
triangle...
9
+,6
3
On your dry erase boards, please write
number sentences for this triangle.
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_____ + _____ = ______
_____ + _____ = ______
9
+,6
3
_____ - _____ = ______
_____ - _____ = ______
This is called a fact family.
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Let's look at this fact triangle again...
9
6
+,3
The dot on top shows the largest
number which is the sum of the two
other numbers (addends)...
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9
6
+,-
3
If we cover up the number with the
dot, then we add the other two
numbers (addends) to solve the addition
problem.
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9
6
+,-
3
If we cover up the other numbers
without the dot, then we subtract the
smaller number (minuend) from the
larger number to solve the subtraction
fact.
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Can anyone come up with 3 numbers we can put
into this triangle to make a fact family?
+,Let's write the fact family on our dry erase
boards...
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_____ + _____ = ______
_____ + _____ = ______
+,-
_____ - _____ = ______
_____ - _____ = ______
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Can anyone come up with another 3 numbers we
can put into this triangle to make a fact family?
+,Let's write the fact family on our dry erase
boards...
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_____ + _____ = ______
_____ + _____ = ______
+,-
_____ - _____ = ______
_____ - _____ = ______
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Can anyone come up with another 3 numbers we
can put into this triangle to make a fact family?
+,Let's write the fact family on our dry erase
boards...
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_____ + _____ = ______
_____ + _____ = ______
+,-
_____ - _____ = ______
_____ - _____ = ______
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Do all fact families have 4 facts in their family?
+,-
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Take out your fact triangles. Now we are going
to get into groups of 2-3 and quiz each other
using our triangles. Here is one more
demonstration...
10
+,3
7
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Please take out your math journal 1 workbooks
and a pencil. Turn to page 51.
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Math Boxes
3.3
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Home Link/
Homework
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Grammar Practice
Pages
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