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Learning Intention:Â Substitute integers into simple formulae (CL4)
Learning Intention:Â Substitute integers into simple formulae (CL4)
Diagnostic: eg. A = (n + 1)2. What is the value of A when n = 3? n = -5? )
Diagnostic: eg. A = (n + 1)2. What is the value of A when n = 3? n = -5? )
Explanation:
Explanation:
In algebra, when we replace letters in an expression or equation with numbers we call it substitution.
In algebra, when we replace letters in an expression or equation with numbers we call it substitution.
How can 4 + 3 x 🤣  be written as an algebraic expression?
How can 4 + 3 x 🤣  be written as an algebraic expression?
Using n for the variable we can write this as 4 + 3n
Using n for the variable we can write this as 4 + 3n
We can evaluate the expression 4 + 3n by substituting different values for n.
We can evaluate the expression 4 + 3n by substituting different values for n.
When n = 5
When n = 5
4 + 3n = 4+ 3 x 5
4 + 3n = 4+ 3 x 5
= 4 + 15
= 4 + 15
= 19
= 19
When n = 11
When n = 11
4 + 3n = 4+ 3 x 11
4 + 3n = 4+ 3 x 11
= 4 + 33
= 4 + 33
= 37
= 37
Example and Tasks:
Example and Tasks:
Grab a worksheet on the appropriate skill
Grab a worksheet on the appropriate skill
Find a suitable task in your Workbook or on Education perfect.
Find a suitable task in your Workbook or on Education perfect.
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