# Concept Map

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# Textbook

## Useful websites

1. Surds starts with basic concepts,(to view the next page, please click on previous/up/next options in the bottom of the page
3. surds and other rootsThis page discusses surds and roots in detail.
4. Video on Surds from Youtube :simplifying surds,rationalising surds,dividing and multiplying surds

## Reference Questions

1. what is the meaning of surds?
2. Difference between like and unlike surds.
3. Meaning of Pure and mixed surds.
4. Simplification of rationalising the denominator.

# Teaching Outlines

## Concept 1: Definition of surds

### Learning objectives

1. know the meaning of surds
2. recognising radicand and order of surds

### Notes for teachers

If you can't simplify a number to remove a square root (or cube root etc) then it is a surd. If it is a root and irrational, it is a surd. But not all roots are surds.

### Activities

1. Activity No #2 Concept Name - Activity No.

## Concept: Like and Unlike surds

### Learning objectives

1. Know the meaning of surd
2. recognising the meaning of order and radicand
3. Examples of like and unlike surds
4. To change surd to simplest form

### Notes for teachers

1. Like surds: A group of surds having same order and same radicand in their simplest form

Example: $3\sqrt{5}, 7\sqrt{5}, x\sqrt{5}$

1. Unlike surds: Groups of surds having different orders or different radicandsor both in their simplest form

Example: $\sqrt{a}, 3\sqrt{2}, x\sqrt{5}$

### Activities

1. Activity No:1 Like surds - Activity No.
1. Activity No:2 Unlike surds - Activity No.