This presentation is intended to help the education students by giving an idea on how they will use technology in education specially in teaching mathematics.

1. Grade 7 Mathematics
EVALUATING
AN
ALGEBRAIC
EXPRESSION

2. 1. replacing the
variable by the given
value
2. performing the
indicated arithmetic
following the order of
operations(GEMDAS)
Evaluation of algebraic expression involves two steps:

3. Evaluate
x + 3 ; if x=3
= (3) + 3
= 6

4. Evaluate
9a + 3; if a=6
= 9(6) + 3
= 54 + 3
=57

5. Evaluate
2a – 3b +4c ; if a=3, b=1, c=-2
=2(3) -3(1) + 4(-2)
=6 – 3 – 8
= -5

6. Evaluate
a2 + 2ab + b2 ; if a=2, b=5
=22 + 2(2)(5) + 52
= 4 + 20 + 25
= 49

7. Evaluate the following expressions
1. a3 + 9a + b
2. 9a2 + b2
3. a2 + a + 4b
4. 𝑎2+ 3b
5. 6a + b3
6. 3a2 + 2b
a=2
b=3

8. EXODUS

9. Exodus means . . .
•Departure
•Withdrawal
•Evacuation
•Leaving

10. Evaluate each algebraic expression.
1. a + b +c
2. 8ab +9c
3.
𝑎𝑐
𝑏
4. 𝑏2 + ac
5. (
𝑎
𝑐
)2
a=5
b=-5
c=7

11. Assignment
1.On your textbook, answer letter C on
page 82.
2.Read lesson 3.5 on pages 83-84.
Reference:
Elementary Algebra

12. Thank you for listening!