Mary has 3 apples' Ron has 2 more than Mary' How many apples does Ron have

1
Three ways to think about addition

• Mary has 3 apples. Ron has 2 apples. How many
  apples do they have in all?

2
3
Combining
3 2 5

• Mary had 3 apples. Then she got 2 more. How many
  apples does she have now?

2
3
3 2 5
Increasing

• Mary has 3 apples. Ron has 2 more than Mary. How
  many apples does Ron have?

3
Adding on the difference
3 2 5
2
Combining

• Mary has 3 apples. Ron has 2 apples. How many
  apples do they have in all?

2
3
3 2 5
can lead to two Separating problems.
Together Mary and Ron have 5 apples. If Mary has
3, how many does Ron have?
?
3
5 - 3 2
2
?
Together Mary and Ron have 5 apples. If Ron has
2, how many does Mary have?
5 - 2 3
3
Increasing

• Mary had 3 apples, then she got 2 more, how many
  apples does she have now?

2
3
3 2 5
can lead to two Decreasing problems.
Mary had 5 apples, but she gave 3 to Ron. How
many does she have now?
?
3
5 - 3 2
2
?
Mary had 5 apples, but now she just has 2. How
many did she give away?
5 - 2 3
4
Adding on the difference

• Mary has 3 apples, Ron has 2 apples more than
  Mary, how many apples
• does Ron have?

3
3 2 5
can lead to a Finding the difference problem
and...
Mary has 3 apples. Ron has 5 apples. How many
more apple does Ron have?
3
5 - 3 2
and can lead to a Subtracting the difference
problem.
Ron has 5 apples. Mary has 2 fewer apples. How
many apples does Mary have?
?
5 - 2 3