multiplication & division mystery!
DESCRIPTION
Multiplication & Division MYSTERY!. For our BBES 3 rd Graders. Remember: if you know ONE fact in a fact family, you know the WHOLE, ENTIRE fact family!. Fact Families. Like… if you know 2 x 5 = 10. Then you know 5 x 2 = 10. and 10 5 = 2. and 10 2 = 5. Fact Families. Or. - PowerPoint PPT PresentationTRANSCRIPT
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Multiplication & Division
MYSTERY!For our BBES 3rd Graders
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Fact FamiliesRemember: if you know ONE fact in
a fact family, you know the WHOLE, ENTIRE fact family!
Like… if you know 2 x 5 = 10Then you know 5 x 2 = 10
and 10 5 = 2
and 10 2 = 5
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Fact Families
Or
if you know 20 4 = 5
Then you know 20 5 = 4
and 5 x 4 = 20
and 4 x 5 = 20
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It’s a PIECE OF CAKE!
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Using what you know about fact families, figure out the number that is missing in
each number model!Write it on your white board when
you know the answer!
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What number is missing?
6 x ____ = 36
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What number is missing?
6 x 6 = 36
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What number is missing?
____ x 4 = 12
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What number is missing?
3 x 4 = 12
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What number is missing?
9 ____ = 3
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What number is missing?
9 3 = 3
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What number is missing?
7 x ____ = 49
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What number is missing?
7 x 7 = 49
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What number is missing?
9 x ____ = 27
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What number is missing?
9 x 3 = 27
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What number is missing?
56 ____ = 7
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What number is missing?
56 8 = 7
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What number is missing?
5 x ____ = 40
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What number is missing?
5 x 8 = 40
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What number is missing?
10 ____ = 2
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What number is missing?
10 5 = 2
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What number is missing?
3 x ____ = 24
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What number is missing?
3 x 8 = 24
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What number is missing?
81 ____ = 9
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What number is missing?
81 9 = 9
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What number is missing?
2 x ____ = 20
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What number is missing?
2 x 10 = 20
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What number is missing?
18 ____ = 3
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What number is missing?
18 6 = 3
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What number is missing?
12 x ____ = 144
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What number is missing?
12 x 12 = 144
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What number is missing?
32 ____ = 8
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What number is missing?
32 4 = 8
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What number is missing?
10 x ____ = 50
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What number is missing?
10 x 5 = 50
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What number is missing?
8 ____ = 8
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What number is missing?
8 1 = 8
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Now look at the number model given on each of the next slides. Write the three number models that are in
the same fact family as those equations.
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What equations complete the fact family?
7 x 3 = 21
____ x ____ = _____
____ ____ = _____
____ ____ = _____
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What equations complete the fact family?
7 x 3 = 213 x 7 = 21
21 7 = 3
21 3 = 7
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What equations complete the fact family?
18 9 = 2
____ ____ = _____
____ x ____ = _____
____ x ____ = _____
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What equations complete the fact family?
18 9 = 218 2 = 9
2 x 9 = 18
9 x 2 = 18
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What equations complete the fact family?
4 x 2 = 8
____ x ____ = _____
____ ____ = _____
____ ____ = _____
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What equations complete the fact family?
4 x 2 = 82 x 4 = 8
8 2 = 4
8 4 = 2
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What equations complete the fact family?
3 x 11 = 33
____ x ____ = _____
____ ____ = _____
____ ____ = _____
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What equations complete the fact family?
3 x 11 = 3311 x 3 = 33
33 11 = 3
33 3 = 11
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Way to go!!!