Hong Kong
Stage 2

# Decimal patterns with tenths (add/sub)

Lesson

We've seen that we can add decimals in a similar way to adding whole numbers. We've also seen how to create and continue patterns with whole numbers. Let's bring these two together now, and work with patterns that use decimals!

Here are some examples of ways patterns can be described.

Complete the pattern by adding 0.3 each time.
$0.4$0.4, ___, ___, ___, ___, ___

or perhaps simply:

Complete the pattern.
$3.6$3.6, $3.3$3.3, $3.1$3.1, ___, ___

Watch the video below to see how we do these!

So to complete a pattern, we need to:

1. Find the pattern - which will either be given, or which will need to be found by looking at the list of numbers.
2. Continue the pattern - using the pattern that you found.

#### Worked Examples

##### Question 1

Complete the pattern by adding $0.1$0.1 each time.

1.  $0.1$0.1 $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$

##### Question 2

Consider the following pattern.

1. What is the pattern?

 $0.3$0.3 $0.5$0.5 $0.7$0.7 $\editable{}$ $\editable{}$ $\editable{}$

The numbers are increasing by $0.02$0.02.

A

The numbers are increasing by $0.2$0.2.

B

The numbers are increasing by $2$2.

C

The numbers are increasing by $20$20.

D
2. Now complete the pattern.

 $0.3$0.3 $0.5$0.5 $0.7$0.7 $\editable{}$ $\editable{}$ $\editable{}$

##### Question 3

Consider the following pattern.

1. What is the pattern?

 $1.8$1.8 $1.6$1.6 $1.4$1.4 $\editable{}$ $\editable{}$ $\editable{}$

The numbers are decreasing by $2$2.

A

The numbers are decreasing by $0.2$0.2.

B

The numbers are decreasing by $0.02$0.02.

C

The numbers are decreasing by $20$20.

D
2. Now complete the pattern.

 $1.8$1.8 $1.6$1.6 $1.4$1.4 $\editable{}$ $\editable{}$ $\editable{}$