Hong Kong
Stage 1

# Numbers, words and symbols (tenths/hundredths)

Lesson

If you had an apple and you cut it into $2$2 equal pieces to share with a friend, how much would each of you get? You would each get half an apple. One half is an example of a number that is less than one whole. It can be written as $\frac{1}{2}$12 as a fraction or $0.5$0.5 as a decimal.

We can express a part of a whole in words, or we can use numbers and symbols (e.g. fractions or decimals).

Watch this video to see how.

#### Worked examples

##### Question 1

How do we write the number $0.89$0.89 in words?

1. eighty nine

A

eighty nine tenths

B

eighty nine hundredths

C

eighty nine thousandths

D

##### Question 2

Look at the diagram.

1. How many squares are shaded in total?

2. What part of the grid is coloured in yellow?

Written Expression $\editable{}$ out of $100$100 $\frac{\editable{}}{100}$100​ $0.$0.$\editable{}$
3. What part of the grid is coloured in blue?

Written Expression $\editable{}$ out of $100$100 $\frac{\editable{}}{100}$100​ $0.$0.$\editable{}$
4. What part of the grid is coloured in red?

Written Expression $\editable{}$ out of $100$100 $\frac{\editable{}}{100}$100​ $0.$0.$\editable{}$
5. How many squares are shaded in total?

Written Expression $\editable{}$ out of $100$100 $\frac{\editable{}}{100}$100​ $\editable{}$

##### Question 3

We want to write "$690$690 hundredths" as a decimal.

1. Which of the following statements is true?

$6.9$6.9 and $6.90$6.90 are different values

A

$6.9$6.9 is a simpler way of writing $6.90$6.90

B

$6.90$6.90 is a simpler way of writing $6.9$6.9

C