Math Lesson 6.4, Fact Triangles
Student Math Journal 2, Activity Sheets 9 and 10
Teaching Masters 170, 173, 174
Math Journal 2, Student Pages 116 and 117
Game Master 343
Home Link 171 & 172
Math Message:
Write the fact family for this domino:
Home Link 6.3 Follow Up:
Record the fact families for these dominoes.
10
+,6
4
6 + 4 = 10
4 + 6 = 10
10 - 4 = 6
10 - 6 = 4
Fact Triangle
10
+,6
4
Fact Triangles will be used to practice basic addition and subtraction facts.
The word fact has an everyday meaning and a mathematical meaning.
Now, use your own set of Fact Triangles and generate fact families
with your partner.
Beat the Calculator
Materials: a calculator; a penny or a random-number generator (optional); 1 Fact Power Table (optional)
Number of Players: 3
Directions: One player is the "Caller," a second player is the "Calculator,"
and the third is the "Brain."
Players trade roles every 10 turns or so.
Brain
Caller
Calculator
Playing the Fact Power Game
2 players, or small groups
For each new game, use the game mat of one of the players.
Directions:
Players place their markers on START. They take turns rolling a die and moving their markers the correct number of spaces across
the rows, as indicated by the arrows on the game mat.
Game Master, Fact Power Game Mat
Student Page, Math Journal 2, page 116
Student Page, Math Journal 2, page 117
Writing and Reasoning
How do you know what to write on
the name-collection box?
Write this number in pencil:
10
For constructing fact families, roll two different colored dice.
Record each number sentence using the corresponding colors.
+,Write this number in red:
6
Write this number in blue:
4
For the previous fact triangle, your number
sentences would look like this:
6 + 4 = 10
4 + 6 = 10
10 - 4 = 6
10 - 6 = 4
Use colors that correspond to the
available dice.
+,-
___ + ___ = ___
___ + ___ = ___
___ - ___ = ___
___ - ___ = ___
7
8
1
2
6
9
3
0
4
7
5 1
8
2
6
9
3
0
4
5
Make a fact family house. Remember,
only numbers on the roof can live in the
house of number sentences.
4, 5, 9
___ + ___ = ___
___ + ___ = ___
___ - ___ = ___
___ - ___ = ___
Make a fact family house. Remember,
only numbers on the roof can live in the
house of number sentences.
3, 5, 8
___ + ___ = ___
___ + ___ = ___
___ - ___ = ___
___ - ___ = ___
Make a fact family house. Remember,
only numbers on the roof can live in the
house of number sentences.
3, 7, 10
___ + ___ = ___
___ + ___ = ___
___ - ___ = ___
___ - ___ = ___
Math Masters 172, 173, 174