Decimals

Hong Kong

Stage 1

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.

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

eighty nine

Aeighty nine tenths

Beighty nine hundredths

Ceighty nine thousandths

D

Look at the diagram.

How many squares are shaded in total?

What part of the grid is coloured in yellow?

Give your answer as a:

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

Give your answer as a:

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

Give your answer as a:

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

Give your answer as a:

Written Expression $\editable{}$ out of $100$100 Fraction $\frac{\editable{}}{100}$100 Decimal $\editable{}$

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

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