Doubles Addition
5+5
10
What number has a 1 in the tens place and a 9 in the ones place?
What is expanded form?
When you find the value of each place and add them together.
For example: 20 (tens) + 7 (ones) = 27
10 - 5
5
10 + 3
13
6+6
12
What number has a 2 in the tens place and a 6 in the ones place?
26
Write down the expanded form of 55.
50 + 5
7 - 4
3
11 + 4
15
7+7
14
What number has a 4 in the tens place and a 7 in the ones place?
47
Write down the expanded form of 39.
30 + 9
12 - 8
4
13 + 5
18
8+8
16
What number has a 9 in the ones place and a 7 in the tens place?
What number has the expanded form of 90 + 7?
97
18 - 9
9
15 + 4
19
9+9
18
*TRICKY* What number has a 2 in the hundreds place, a 5 in the tens place, and a 1 in the ones place?
251
What number has the expanded form of 60 + 3?
63
19 - 7
12
*TRICKY* 18 + 5
23