1. Graphical Approach to solve multi-step
problems
Mr. Knapp had some stamps. If he gave 7 stamps to each of his children, he would have 5 stamps left. If he gave 8 stamps to each child, he would need 3 more stamps in order for them to have an equal number of stamps. How many stamps did Mr. Knapp have?
70 Must Know Word Problems, Level 4 (Singapore: Singapore Asian Ltd., 2009)

2. Graphical Approach to solve multi-step
problems
Mr. Knapp had some stamps. If he gave 7 stamps to each of his children, he would have 5 stamps left. If he gave 8 stamps to each child, he would need 3 more stamps in order for them to have an equal number of stamps. How many stamps did Mr. Knapp have?
70 Must Know Word Problems, Level 4 (Singapore: Singapore Asian Ltd., 2009)

3. Graphical Approach to solve multi-step
problems
If he gave 7 stamps to each of his
children, he would have 5 stamps left. ?
= Number of children
Stamps ? 5

4. Graphical Approach to solve multi-step
problems
2) If he gave 8 stamps to each child, he
would need 3 more stamps in order for
them to have an equal number of
stamps.
Stamps ? 5 3 ?

5. Graphical Approach to solve multi-step
problems 5
Stamps ? 3
Number of children

6. Graphical Approach to solve multi-step
problems
Stamps 3 ? ? ? ? ? ? ? 5 ? ? ? ? ? ? ? 8
Number of children

7. Graphical Approach to solve multi-step
problems
Stamps 3 8 8 8 8 8 8 8 5 8 8 8 8 8 8 8 8
Number of children
Number of stamps: 56
+ 5 = 61

8. Graphical Approach to solve multi-step
problems
Stamps 3
= 61 8 8 8 8 8 8 8 5 8 8 8 8 8 8 8 8
Number of children
Number of stamps: 56
+ 5 = 61

9. Graphical Approach to solve multi-step
problems
Algebraic Approach
Mr. Knapp had some stamps. If he gave 7 stamps to each of his children, he would have 5 stamps left. If he gave 8 stamps to each child, he would need 3 more stamps in order for them to have an equal number of stamps. How many stamps did Mr. Knapp have?

10. Graphical Approach to solve multi-step
problems
Algebraic Approach
Let,
x = number of students
N = number of stamps

11. Graphical Approach to solve multi-step
problems
Algebraic Approach
x = number of students
N = number of stamps
If he gave 7 stamps to each of his
children, he would have 5 stamps left.
7x + 5 = N

12. Graphical Approach to solve multi-step
problems
Algebraic Approach
x = number of students
N = number of stamps
7x + 5 = N
2) If he gave 8 stamps to each child, he
would need 3 more stamps in order for
them to have an equal number of
stamps.
8x = N + 3

13. Graphical Approach to solve multi-step
problems
Algebraic Approach
x = number of students
N = number of stamps
7x + 5 = N
8x = N + 3

14. Graphical Approach to solve multi-step
problems
Algebraic Approach
8x = N + 3
– ( ) -
7x = N
x – = 3 or
x = 8,
the number of students
N = 61
the number of stamps