You can make a 10
to help you add 9.
Move 1 counter from 6 to 9.
Now I have
10 and 5.
9
6
____
?
9
4
______
?
2.
9
7
______
10
3
______
9
4
______
so
13
10
6
______
13
so
9
7
______
?
3.
9
6
______
10
5
______
9
so
6
______
?
Do you understand? How do you make 10 to add 9 3?
498
four hundred ninety-eight
27280_497-500.indd 2
10
5
____
15
so
9
6
____
15
The sums
are the same!
Guided Practice
Draw counters to help you add. Then write the sums.
1.
10 + 5 is
the same as
9 + 6.
Independent Practice
Draw counters to help you add. Write the missing addend.
Then write the sums.
4.
9
8
______
10
so
9
8
______
so
9
5
______
so
9
9
______
______
?
5.
9
5
______
10
______
?
6.
9
9
______
10
______
?
four hundred ninety-nine
499
3/26/07 9:40:35 AM