Number Patterns

Hong Kong

Stage 2

Lesson

You may have already looked at how to write rules to describe decimal patterns. Now we're going to build on those skills and look at how to write a general rule using pronumerals. A pronumeral is a letter that is used to represent an unknown value in a mathematical expression or formula.

Watch this video now to learn more about using pronumerals to describe decimal patterns.

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

$0.1$0.1 $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ If $c$

`c`belongs to the same pattern, what is the next number?

Complete the pattern by subtracting $0.3$0.3 each time.

$5.4$5.4 $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ If $c$

`c`belongs to the same pattern, what is the next number?

Consider the following pattern.

What is the pattern?

$6.2$6.2 $12.2$12.2 $18.2$18.2 $\editable{}$ $\editable{}$ $\editable{}$ The numbers are increasing by $6$6.

AThe numbers are increasing by $60$60.

BThe numbers are increasing by $0.6$0.6.

CThe numbers are increasing by $0.06$0.06.

DNow complete the pattern.

$6.2$6.2 $12.2$12.2 $18.2$18.2 $\editable{}$ $\editable{}$ $\editable{}$ If $x$

`x`belongs to the same pattern, what is the next number?