Two-Digit Addition ChallengeVersión en línea
por arNas
1
What is 23 + 47?
2
What is 54 + 29?
3
What is 37 + 46?
4
What is 68 + 27?
5
What is 15 + 58?
6
What is 42 + 59?
7
What is 31 + 67?
8
What is 26 + 74?
9
What is 49 + 28?
10