In earlier lessons we have learned the order of operations. Have a look at the following problem and be sure to use the correct order of operations.
Find the value of 12 \times \left(5+6\right) -35
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.
This video shows some examples of working out the value of an expression that involve decimals and 2 operations.
Find the value of 8.5+0.65\times10.
The order of operations is the same for decimals as it is for whole numbers.
This video shows some examples of working out the value of an expression that involve decimals and 3 operations.
Find the value of 0.6\times8-0.6\times4, giving your answer as a decimal.
When solving expressions with more than one operation, we have to follow the order of operations, this includes expressions with decimals.
This video shows how to enter calculations with decimals on a calculator.
Estimate the answer by rounding both values to the nearest whole number.
Use a calculator to evaluate 11.59\div4.44 and write the answer below. Give your answer to two decimal places.
What is the difference between the estimate and the actual answer?
We can use calculators to make calculations with decimals easier. The calculator also uses the order of operations.
compares, orders and calculates with fractions, decimals and percentages