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Study
Addition and subtraction to 20
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19-12
7
Oops!
Okay!
What is this shape?
Cone
Oops!
Okay!
What is this shape?
Cylinder
Oops!
Okay!
What is this shape?
Sphere
Oops!
Okay!
What is this shape?
Sphere
Oops!
Okay!
21-6
15
Oops!
Okay!
What is this shape?
Pyramid
Oops!
Okay!
8+9
17
Oops!
Okay!
17-6
11
Oops!
Okay!
20-7
13
Oops!
Okay!
10+9+1
20
Oops!
Okay!
10+7
17
Oops!
Okay!
20-14
6
Oops!
Okay!
16-8
8
Oops!
Okay!
What is this shape?
Cube
Oops!
Okay!
18-7
11
Oops!
Okay!
6+9
15
Oops!
Okay!
15-5+2
12
Oops!
Okay!
9+4
13
Oops!
Okay!
What is this shape?
Pyramid
Oops!
Okay!
19-14
5
Oops!
Okay!
What is this shape?
Pyramid
Oops!
Okay!
20-18
2
Oops!
Okay!
3+7+8
18
Oops!
Okay!
10+7+3
20
Oops!
Okay!
20-10
10
Oops!
Okay!
15+6
21
Oops!
Okay!
7+7
14
Oops!
Okay!
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