1. Number and place value

1.01 Read and write numbers

1.02 Order numbers

1.03 Partition numbers

1.04 Place value

1.05 Round numbers

1.06 Estimation

1.07 Factors and multiples

1.08 Prime and composite numbers

1.09 Square and triangular numbers

1.10 Multiplication and division by 10 and 100

1.11 Multiply and divide by 10; the powers of 10

Stage 3

1.09 Square and triangular numbers

Interactive practice questions

Write down the next $3$3 triangular numbers.

$1$1, $3$3, $6$6, $10$10, $15$15, $\editable{}$, $\editable{}$, $\editable{}$

Easy

< 1min

Beginning with the $eighth$ triangular number, write down the next $3$3 triangular numbers is this series.

Easy

< 1min

Find the $6$6th triangular number.

Medium

1min

Find the $9$9th triangular number.

Medium

< 1min

Outcomes

MA3-4NA

orders, reads and represents integers of any size and describes properties of whole numbers

MA3-5NA

selects and applies appropriate strategies for addition and subtraction with counting numbers of any size

MA3-6NA

selects and applies appropriate strategies for multiplication and division, and applies the order of operations to calculations involving more than one operation

What is Mathspace

About Mathspace