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Here are 10 sets of 5.
How many cubes is
that?
Nine times
I know!
10 x 5 = 50
Nine times
Nine times
So how would I change
this to get 9 x 5 ?
Take off one set of
5
So 9 x 5 = 45
Nine times
Nine times
Here are 10 sets of 7.
How many cubes
is that?
Nine times
I know!
10 x 7 = 70
Nine times
So how would I
change this to get
9 x 7 ?
Nine times
Take off one
set of 7.
So, 9 x 7 = 63
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
Here is a pattern of
the answers we
have found. What
do you notice?
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
The times number
is always one more
than the tens digit
of the answer.
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
Give an example
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
6 x 9 has an
answer in
the fifties
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
What else do
you notice?
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
The digits in
each answer
add to 9
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
Give an example
2 x 9 = 18
3 x 9 = 27
6 x 9 = 54
8 x 9 = 72
2 + 7 = 9

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Top Drawer Teachers: Nine Times

  • 1. Here are 10 sets of 5. How many cubes is that? Nine times
  • 2. I know! 10 x 5 = 50 Nine times
  • 3. Nine times So how would I change this to get 9 x 5 ?
  • 4. Take off one set of 5 So 9 x 5 = 45 Nine times
  • 5. Nine times Here are 10 sets of 7. How many cubes is that?
  • 7. Nine times So how would I change this to get 9 x 7 ?
  • 8. Nine times Take off one set of 7. So, 9 x 7 = 63
  • 9. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 Here is a pattern of the answers we have found. What do you notice?
  • 10. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 The times number is always one more than the tens digit of the answer.
  • 11. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 Give an example
  • 12. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 6 x 9 has an answer in the fifties
  • 13. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 What else do you notice?
  • 14. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 The digits in each answer add to 9
  • 15. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 Give an example
  • 16. 2 x 9 = 18 3 x 9 = 27 6 x 9 = 54 8 x 9 = 72 2 + 7 = 9