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adding numbers

Last updated almost 7 years ago
10 questions
Note from the author:
do all problems
1

5 + 3

1

6 + 5

1

1 + 2 + 3

1

6 + 2

1

5 + 3 = 9

1

100 + 60

1

50 + 20

1

20 + 1 + 2

1

59 + 10

1

123 + 20