Equivalent Expressions

1
24 November, 2009

• Equivalent Expressions
• L.O. To simplify algebraic expressions (Level 5)

Starter
a 2b c
a b b c
3a 4b c 4
2a 2b 1
b c
a b
a 2b c 3
a b a b 1
a
b
c
a b
a b 1
b c 2
For each block find the sum of the two blocks
underneath.
2
Algebraic pyramids
Equivalent Expressions L.O. To simplify algebraic
expressions (Level 5)

• Now try the Algebraic Pyramids worksheet
• (10 ticks level 5 pack 5 pages 14 and 15)

3
Equivalent Expressions L.O. To simplify algebraic
expressions (Level 5)

• When there are negative terms!

2a 3b a 4b
The negative sign stays with the term immediately
after it.
3b 4b
2a - a
10 QQ

7b
a
4
Equivalent Expressions L.O. To simplify algebraic
expressions (Level 5)

• Refer to notes in text book on algebraic notation
• Simplifying algebraic expressions

5
Equivalent Expressions L.O. To simplify algebraic
expressions (Level 5)

• PLENARY

Whiteboard activity
9a 8b
Simplify 5a 6b 4a 2b
Can you think up an expression for the rest of
the class to simplify? You will need to know the
answer to your own question!!!!
8x 18y
Simplify 6y x 7x 12y
5t 27b
Simplify 24t 6b - 19t 21b