Substitution in Formula

1
Substitution in Formula
Cairo Market - Prices Camel 20
Deben Sphinx 7 Deben Pyramid 52 Deben
Achbar the Egyptian is in the market selling his
camels.
What will the value of the following be
Remember, you must multiply before adding
Deben
2
Cairo Market - Prices Camel 20
Deben Sphinx 7 Deben Pyramid 52 Deben
How many debens will Achbar have for
Deben
3
A Different Market
Luxor Market - Prices Camel 15
Deben Sphinx 10 Deben Pyramid 45 Deben
The prices are different in the market at Luxor
What will the value of the following be
Deben
4
Are the pictures necessary?
We can write the problem easier without the
pictures
Luxor Market - Prices C 15 Deben S 10
Deben P 45 Deben
What will the value of the following be
Deben
5
Exercise
Alexandria Market C 15 S 10 P 45

• What will the value of the
• following be
• .
• .
• .
• .
• .

6
Subtracting in the Market
Giza Market C 12 S 20 P 31
Remember that we can subtract as well as add
What will the value of the following be
7
Exercise
C 12 S 20 P 31

• Calculate the value of
• .
• .
• .
• .
• .

8
Worksheet
Answer the questions on the worksheet in your
books. Remember to follow the same method as that
given in the examples Answers
1. 2. 3. 4. 5. 6.
7. 8. 9. 10. 11. 12.
13. 14. 15. 16.
9
Worksheet
There are more than one answer to some of the
following questions
17. 28. 29. 20. 21.
A camel and10 deben is worth 22 deben, therefore