you will need…. a pencil your math journal a hundred chart
TRANSCRIPT
You will need….
a pencil your math journal a hundred chart
What do you notice about What do you notice about these facts…..these facts…..
10 + 4
10 + 8
6 + 10
9 + 10
5 + 10
10 + 3
7 + 10
10 + 9
3 + 10
You have shown that you know these facts
10 + 4
10 + 8
6 + 10
9 + 10
5 + 10
10 + 3
7 + 10
10 + 9
3 + 10
Do you think there is a pattern to Do you think there is a pattern to adding ten?adding ten?
10 + 4
10 + 8
6 + 10
9 + 10
5 + 10
10 + 3
7 + 10
10 + 9
3 + 10
Do you think that pattern works Do you think that pattern works with ALL numbers?with ALL numbers?
10 + 4
10 + 8
6 + 10
9 + 10
5 + 10
10 + 3
7 + 10
10 + 9
3 + 10
With a partner, think of 6 different With a partner, think of 6 different numbers that are greater than 20 numbers that are greater than 20
but less than 100.but less than 100.
Record those numbers in the Record those numbers in the column that says “My Number”column that says “My Number”
After choosing and recording 6 After choosing and recording 6 numbers, write your number + 10 in numbers, write your number + 10 in
the next columnthe next column
After choosing and recording 6 After choosing and recording 6 numbers, write your number + 10 in numbers, write your number + 10 in
the next columnthe next column
Then make a prediction of what the Then make a prediction of what the sum of your number plus ten will sum of your number plus ten will
be.be.
After making all of your After making all of your predictions, use a hundred predictions, use a hundred
chart to find the actual sum of chart to find the actual sum of your number plus ten.your number plus ten.
We will come back together in a We will come back together in a few moments. Be prepared to few moments. Be prepared to
share:share:
•The sums you foundThe sums you foundIf there is a pattern or ruleIf there is a pattern or rule
What changedWhat changedWhat stayed the sameWhat stayed the same
What do you notice about What do you notice about these facts…..these facts…..
14 - 10
18 - 10
16 - 10
19 - 10
15 - 10
12 - 10
17 - 10
11 + 10
13 - 10
You have shown that you know these facts.
14 - 10
18 - 10
16 - 10
19 - 10
15 - 10
12 - 10
17 - 10
11 + 10
13 - 10
Do you think there is a pattern to subtracting 10?
14 - 10
18 - 10
16 - 10
19 - 10
15 - 10
12 - 10
17 - 10
11 + 10
13 - 10
Do you think that pattern works with ALL numbers?
14 - 10
18 - 10
16 - 10
19 - 10
15 - 10
12 - 10
17 - 10
11 + 10
13 - 10
With a partner, think of 6 different With a partner, think of 6 different numbers that are greater than 20 numbers that are greater than 20
but less than 100.but less than 100.
Record those numbers in the Record those numbers in the column that says “My Number”column that says “My Number”
After choosing and recording 6 After choosing and recording 6 numbers, write your number - 10 in numbers, write your number - 10 in
the next columnthe next column
After choosing and recording 6 After choosing and recording 6 numbers, write your number - 10 in numbers, write your number - 10 in
the next columnthe next column
Then make a prediction of what the Then make a prediction of what the difference of your number minus difference of your number minus
ten will be.ten will be.
After making all of your After making all of your predictions, use a hundred predictions, use a hundred
chart to find the actual chart to find the actual difference of your number difference of your number
minus ten.minus ten.
We will come back together in a We will come back together in a few moments. Be prepared to few moments. Be prepared to
share:share:
•The differences you foundThe differences you foundIf there is a pattern or ruleIf there is a pattern or rule
What changedWhat changedWhat stayed the sameWhat stayed the same
Now that we’ve shared our ideas…Now that we’ve shared our ideas…
•Write a rule to help you remember Write a rule to help you remember facts that subtract 10.facts that subtract 10.
• Remember to illustrate your rules Remember to illustrate your rules with an example.with an example.
If you finish early, you If you finish early, you can play a math fact can play a math fact
folder game.folder game.