Page 8 of 11 Learning Skills @ CSU
7. Performing calculations
Scientific calculators have an in-built order of operations. This means that the calculator will
automatically work out operations in questions following the order of operation rules. Using an equal
sign within a calculation or using brackets may be necessary at times in order to get the correct solution.
Also remember that when using some function keys you need to close a bracket.
Example 7.1:
2 + 3 4
The calculator will automatically multiply before adding.
Calculator steps: 2 + 3 x 4 =
Answer = 14
Example 7.2:
(2 + 3) 4
Use the brackets on your calculator or use the equal sign after the 3 to force the addition first.
Or 2 + 3 = x 4 =
Answer = 20
Example 7.3:
Calculator steps: 1 ÷ ( 2 5 + 3 4 ) =
Answer = 0.016949152
You must use brackets around the bottom line to total the numbers
Example 7.4
Calculator steps: 5 ÷ √ 1 3 + 5 6 ) =
Answer =0.6019292654
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