Mon June 27th – More work on Simplifying surds

LEARNING OBJECTIVE: Using knowledge of square numbers, simplify surds

SUCCESS CRITRIA: You will be able to simplify a surd using your knowledge of square numbers and the rules of surds

SURDS RULES

√a x √b = √ab	√(a/b) = √a/√b
a√c +b√c = (a+b) √c	a√c - b√c = (a –b)√c

 
 

STARTER: Using the rules of surds simplify the following WITHOUT using your calculator

√3 x √2	√5 x √6	√3 x √12
√14 / √2	√25 / √5	5√2 - 3√2
6√3 + 2√3	7√8 + 3√8	3√3 + √12

 
 

LESSON: Work through Ex 7j page 192 of Higher H GCSE Text book for 30 mins

Use the following examples to show how to simplify surds using a knowledge of square numbers.

√72,    √162,    √250,    √162

Now have a go at Question 6 on page 193 – Check answers, if all OK continue with q7 onwards

EXTENSION
QUESTIONS

PLENARY: Checking answers and five finger feedback on confidence.

Remind homework due to be completed by Thursday