Double it!
Same number twice!
Double that Double!
The Nines Trick
You CAN get there from here!
100
9 x 2
What is 18
100
6 x 6
What is 36?
100
If I know 2 x 8 = 16, What is 4 x 8?
What is 32?
100
3 x 9
What is 27?
100
How can I use 2 x 2 to help me solve 4 x 2.
What is double the answer to 2 x 2?
200
7 x 2
What is 14?
200
7 x 7
What is 49?
200
If I know 2 x 7 = 14, then I know 4 x 7.
What is 28?
200
4 x 9
What is 36?
200
a fact that could help me solve 6 x 7.
What is (2 x 7) (3x 7 ) (4 x 7) or (5 x 7 )
300
When you double me, the sum is 12.
What is 6?
300
8 x 8
What is 64?
300
If I know 2 x 5, then I know 4 x 5.
What is 20?
300
7 x 9
What is 63?
300
a fact that can help me solve 8 x 4
What is (2 x 8) (Other answers also accepted)
400
When you double me, the sum is 16.
What is 8?
400
9 x 9
What is 81?
400
If I know 2 x 9, then I know 4 x 9.
What is 36?
400
8 x 9
What is 72?
400
a fact that can help me solve 12 x 12
What is (many answers accepted)
500
When you double me, the sum is 180.
What is 90?
500
? x ? = 144
What is 12
500
If I know 2 x 70, then I know 4 x 70
What is 280?
500
9 x 9
What is 81?
500
This is how 12 x 10 can help me solve 12 x 20.
What is doubling the answer to 12 x 10.
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