Mathematical Fluency

Addition Matrix

1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0123456789101112131415
12345678910111213141516
234567891011121314151617
3456789101112131415161718
45678910111213141516171819
567891011121314151617181920
6789101112131415161718192021
78910111213141516171819202122
891011121314151617181920212223
9101112131415161718192021222324
10111213141516171819202122232425
11121314151617181920212223242526
12131415161718192021222324252627
13141516171819202122232425262728
Great job!
Sorry, that's incorrect. Try again.
No answer recorded.
Provide feedback on this tool

Provide Feedback

Remember to double check your answer. Thanks for your help!
What's wrong?
  • Alternatively, you can report any technical problems you may be experiencing.