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Strategies / Vocabulary
Adding Doubles
Adding Near Doubles
Standard Form
Expanded Form
100
What strategy are you using when you add 9 + 9 =
Doubles
100
4 + 4 =
8
100
2 + 3 =
5
100
2 tens and 4 ones
24
100
17
1 ten, 7 ones
200
What strategy would you use to solve 5 + 6 =
Doubles + 1
200
5 + 5 =
10
200
3 + 4 =
7
200
4 tens and 9 ones
49
200
56
5 tens, 6 ones
300
What do you call it when you say 3 + 4 = 7 and 4 + 3 = 7
Commutative property
300
7 + 7 =
14
300
6 + 7 =
13
300
3 hundreds 8 tens 1 one
381
300
127
1 hundred, 2 tens, 7 ones
400
When we discuss hundreds, tens, and ones, we are talking about what?
Place value
400
9 + 9 =
18
400
8 + 9 =
17
400
7 hundreds 6 tens 3 ones
763
400
714
7 hundreds, 1 ten, 4 ones
500
If I break 21 into 2 tens, 1 one it is called?
Expanded form
500
12 + 12 =
24
500
10 + 11 =
21
500
1 thousand 5 hundred 5 ones
1505
500
1835
1 thousand, 8 hundreds, 3 tens, 5 ones