Owl Egg
staying ahead wisely
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You have 20 minutes to finish this exercise
Name
Subject
Level
Section
Exercise
Lesson
Sample User
Math
1
Adding Numbers
All Addition Facts to 9 + 9
119
Click on the appropriate choice. When done, click on the submit button.
What is the sum of the 2 numbers?
2
+
8
=
9
+
5
=
4
+
10
=
10
+
8
=
4
+
3
=
4
+
2
=
9
+
8
=
2
+
2
=
6
+
9
=
7
+
3
=
5
+
8
=
10
+
10
=
1
+
9
=
3
+
5
=
8
+
1
=
9
+
1
=
1
+
2
=
6
+
7
=
5
+
7
=
6
+
2
=
1
+
7
=
3
+
8
=
8
+
3
=
2
+
7
=
0
+
9
=
5
+
3
=
1
+
4
=
9
+
3
=
0
+
6
=
10
+
6
=
7
+
1
=
3
+
3
=
7
+
4
=
7
+
10
=
10
+
3
=
9
+
10
=
2
+
4
=
10
+
5
=
0
+
3
=
4
+
5
=
0
+
5
=
9
+
6
=
1
+
3
=
3
+
7
=
8
+
10
=
8
+
8
=
10
+
7
=
3
+
10
=
9
+
9
=
2
+
3
=
1
+
5
=
5
+
9
=
1
+
8
=
5
+
5
=
4
+
4
=
0
+
1
=
7
+
7
=
1
+
6
=
3
+
1
=
0
+
2
=
3
+
9
=
2
+
9
=
10
+
9
=
6
+
4
=
4
+
8
=
0
+
4
=
3
+
2
=
6
+
8
=
0
+
10
=
7
+
9
=
10
+
2
=
8
+
2
=
8
+
9
=
3
+
6
=
6
+
3
=
8
+
4
=
7
+
5
=
2
+
5
=
9
+
2
=
4
+
7
=
6
+
1
=
5
+
6
=
6
+
5
=
3
+
4
=
5
+
10
=
8
+
5
=
6
+
6
=
5
+
2
=
8
+
7
=
7
+
8
=
0
+
7
=
7
+
6
=
6
+
10
=
4
+
1
=
0
+
8
=
5
+
4
=
9
+
4
=
7
+
2
=
1
+
10
=
9
+
7
=
2
+
6
=
2
+
1
=
4
+
6
=
8
+
6
=
1
+
1
=
5
+
1
=
10
+
1
=
10
+
4
=
4
+
9
=