Math Practice Topic: Mental Addition and Subtraction to 100

Description: Adding and subtracting with 10 to be done mentally.

Adaptive Learning Progression: Starts with addition, moves to subtraction, then mixes them.

Sample Levels (out of 8)

Add.

1.
29 + 10 =
2.
12 + 10 =

Subtract.

1.
33 - 10 =
2.
52 - 10 =
3.
43 - 10 =
4.
86 - 10 =
5.
55 - 10 =
6.
88 - 10 =
7.
11 - 10 =
8.
38 - 10 =
9.
89 - 10 =
10.
10 - 10 =

Add or subtract.

1.
51 - 10 =
2.
73 - 10 =
3.
82 + 10 =
4.
42 + 10 =
5.
19 + 10 =
6.
66 - 10 =
7.
73 + 10 =
8.
48 - 10 =
9.
60 + 10 =
10.
41 + 10 =
11.
21 + 10 =
12.
46 - 10 =
13.
28 + 10 =
14.
49 + 10 =
15.
32 + 10 =
16.
80 + 10 =
17.
44 + 10 =
18.
90 - 10 =
19.
28 + 10 =
20.
11 + 10 =

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