In this video we look at writing numbers in numerals from words, writing numbers in expanded notation and also comparing numbers using the inequality symbols for greater than and less than. Having a strong sense of place value is important to be confident with all of these skills.

Worked Examples

question 1

Express the following as a single number:

$4000000+200000+40000+7000+800+80+1$4000000+200000+40000+7000+800+80+1.

Note: Do not use comma separators

question 2

Consider the place-value chart for the number $8739142$8739142.

Millions period			Thousands period			Ones period
hundreds	tens	ones	hundreds	tens	ones	hundreds	tens	ones
		$8$8	$7$7	$3$3	$9$9	$1$1	$4$4	$2$2

In order to round $8739142$8739142 to the nearest million, we have to look at the millions digit.

What is the millions digit?
What is the digit to the right of the millions place?
What should happen to the digit that is to be rounded?
We add $1$1 to it.
A
We do not change it.
B
Therefore, what is $8739142$8739142 rounded to the nearest million?

question 3

Write an inequality symbol ($<$< or $>$>) in the box to make this number sentence true.

$107714\editable{}107540$107714107540

Outcomes

NA3-3

Know counting sequences for whole numbers.

NA3-6

Record and interpret additive and simple multiplicative strategies, using words, diagrams, and symbols, with an understanding of equality

Numbers, words and symbols (millions)