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Identifying repeated
patterns can help you
add and subtract larger numbers.
Look for repeated
patterns using place value patterns.
| 5
+ 4 = 9 |
50
+ 40
= 90 |
500
+ 400
= 900 |
| 5
ones + 4 ones = 9 ones |
5
tens + 4 tens = 9 tens |
5
hundreds + 4 hundreds = 9 hundreds |
What numbers are the same
in each number sentence?
The numbers that are repeated
are 5,4,
and 9.
What is different
in each number sentence?
It's
the number of 0's. There is no zero when you add ones. There is
one zero added to each number when you are
adding tens, and two zeros
added to each number
when you are adding hundreds.
Since 5
+4 = 9,
Then 50 + 40 =
90
and 500 + 400 =
900.
| 8
- 2 = 6 |
80
- 20
= 60 |
800
- 200
= 600 |
| 8
ones - 2 ones = 6 ones |
8
tens - 2 tens = 6 tens |
8
hundreds - 2 hundreds = 6 hundreds |
What numbers are the same
in each number sentence?
The numbers that are repeated
are 8, 2,
and 6.
What is different
in each number sentence?
It's
the number of 0's. There is no zero when you add ones. There is
one zero added to each number when you are subtracting tens, and two
zeros added to each number when you are subtracting hundreds.
Since
8 - 2 =
6,
Then 80 - 20 =
60
and 800 - 200 =
600.
Click on
the apple for practice.
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