3. Multiplication and division
3.09 Solving expressions using order of operations
Lesson
Are you ready?
Stories can help us to understand the operations that need to happen, in order to solve a problem. Have a look at this story, to remember how to write a number sentence to represent the story.
Robert is training for a marathon. On the days he trains, he runs $25$25km on a circuit through his town, which is $5$5km long. Robert trains $6$6 days a week.
Which number sentence describes the number of laps Robert completes per week?
$25\div5\times6$25÷5×6
A$25+5\div6$25+5÷6
B$25\times5\div6$25×5÷6
C$25-5+6$25−5+6
D
Learn
This video explains what the rules are when it comes to the order of operations.
Vocabulary
Another word that is sometimes used for parentheses is brackets
Apply
Question 1
Find the value of $\left(6+4\right)\times\left(6+4\right)$(6+4)×(6+4).
Remember!
The order of operations:
- Solve anything inside grouping symbols (brackets).
- Solve any multiplication or division, including powers, working from left to right.
- Solve any addition or subtraction, working from left to right.