Thurs Oct 13th – Algebra Substitution

LEARNING OBJECTIVE: To understand how to substitute letters for numbers in an expression and work out the value of the expression.

SUCCESS CRITERIA: You will be able to substitute a numerical value for a letter in an expression and then work out what the final value is.

STARTER: Use Screen 1 from this Mymaths Lesson – 2 or three times to give lots of practice

LESSON: Work through the next 2 screens of the Mymaths Lesson to develop the skills of substitution in an equation, use each screen multiple times to consolidate the ideas.

Have a go at the questions on page 73 of year 7 book 2 text book – Try first two together on IWB

PLENARY: Checking Answers.,

Quick Check

x = 3, y= 4, z = 2

Work out

1. 3z + 4
   
2. 5y – 3
   
3. 3x + 7
   
4. x + y
   
5. y – z
   
6. 2x + 3y
   
7. 10x – 6z
   
8. 5y – 2x + 3z