Addition is putting together two or more sets to form a new set. It uses the symbol plus (+) to represent combining numbers. The addends are the numbers that are added together, and the sum is the result of adding two or more numbers. For example, in the addition sentence 2 + 1 = 3, the addends are 2 and 1, and the sum is 3. Practice problems are provided to help understand addition.

1. Mathematics
1

2. Addition

3. What is
Addition?

4. and are
1
apple
1
apple
and
2
apples

5. Addition
is putting together
two or more sets to form
a new set.

6. and are
1
apple
1
apple
and
2
apples

7. are
2
cats
1
cat
and
3
cats
Example:

8. are
and
Example:
and are

9. are
and
Example:
6 6
and are 12

10. In addition, we use the symbol
plus

11. are
and
Example:
2
cats
1
cat
3
cats
+ =

12. are
and
Example:
2 + 1 = 3

13. are
and
Example:
2 + 1 = 3
Addition Sentence

14. 2 + 1 = 3
Parts of Addition
Addends Sum

15. 2 + 1 = 3
Parts of Addition
Addends Sum
2 + 1 = 3
any numbers that are
added together.

16. 2 + 1 = 3
Parts of Addition
Addends Sum
2 + 1 = 3
any numbers that are
added together.
the result of adding
two or more numbers

17. are
and
Example:
6 6
+ = 12

19. Try This!!!

21. 4 1 5

23. 3 9
6

24. + =
+ =

25. + =
3 2 5
+
=

26. + = ?
+
=

27. + =
1 6 7
+
=

28. What is
Addition?

29. Addition
is putting together
two or more sets to form
a new set.

30. In addition, we use the symbol
plus

31. 2 + 1 = 3
Parts of Addition
Addends Sum
2 + 1 = 3
any numbers that are
added together.
the result of adding
two or more numbers

32. Mathematics
1