Math Practice Topic: Understanding 11 to 19

Description: Compose and decompose numbers from 11 to 19 with and without visuals.

Adaptive Learning Progression: Start with just counting, then do base 10 equation with visuals, then do the same equation without visuals.

Sample Levels (out of 6)

Count the number of shaded squares.

1.









# shaded squares:

2.

# shaded squares:

Choose the tens + ones form of the number -- for example, 1X = 10 + X.

1.


12 = 11 + 1
12 = 12 + 0
12 = 1 + 2
12 = 10 + 2
12 = 10+1+1
2.


15 = 12 + 3
15 = 1 + 5
15 = 10 + 5
15 = 15 + 0
15 = 14 + 1
15 = 10+1+1+1+1+1
3.


13 = 10+1+1+1
13 = 13 + 0
13 = 11 + 2
13 = 12 + 1
13 = 1 + 3
13 = 10 + 3
4.








17 = 1 + 7
17 = 13 + 4
17 = 17 + 0
17 = 14 + 3
17 = 10 + 7
17 = 10+1+1+1+1+1+1+1

Complete the equation in the form of tens + ones (e.g., 10 + 5).

1.
17 =
17 = 1 + 7
17 = 10 + 7
17 = 13 + 4
17 = 16 + 1
17 = 17 + 0
17 = 10+1+1+1+1+1+1+1
2.
12 =
12 = 1 + 2
12 = 11 + 1
12 = 12 + 0
12 = 10 + 2
12 = 10+1+1
3.
17 =
17 = 1 + 7
17 = 11 + 6
17 = 15 + 2
17 = 10 + 7
17 = 17 + 0
17 = 10+1+1+1+1+1+1+1
4.
11 =
11 = 10 + 1
11 = 11 + 0
11 = 1 + 1

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