# Order of Operations: Using Brackets on a Calculator

In this worksheet, students use the order of operations and the brackets buttons on a calculator to arrive at answers to problems.

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Calculators/Technology for Accuracy

Difficulty level:

### QUESTION 1 of 10

In this worksheet, you must use the brackets buttons on your calculator.

Remember

The top and the bottom must go in brackets, so that:

 7 + 3 5 × 2
=
 (7 + 3) (5 x 2)
= 1

The order of operations is

1. brackets

2. powers or indices

3. multiplication and division

3 × 42 = 3 × 16 = 48

and (3 × 4)2 = 122 = 144

−52 = −25  = (−(5 × 5))

(−5)2 = +25 = (−5) × (−5)

Work out:

 12 × 772 92 × 20
=

Work out:

 ( 12 × 77 )2 92 × 20
=

Work out:

 -77 x 122 92 + 20
=

Work out:

 77 x ( -12)2 92 + 20
=

Work out:

 79 × 32 3 × 72
=

Work out:

 ( 79 × 3 )2 3 × 72
=

Work out:

 -3 x 792 3 + 72
=

Work out:

 3 x ( -79)2 3 + 72
=

Work out:

 89 + 452 14 × 63
=

Work out:

 ( 89 + 45 )2 14 × 63
=

• Question 1

Work out:

 12 × 772 92 × 20
=

39
• Question 2

Work out:

 ( 12 × 77 )2 92 × 20
=

464
• Question 3

Work out:

 -77 x 122 92 + 20
=

-99
• Question 4

Work out:

 77 x ( -12)2 92 + 20
=

99
• Question 5

Work out:

 79 × 32 3 × 72
=

3
• Question 6

Work out:

 ( 79 × 3 )2 3 × 72
=

260
• Question 7

Work out:

 -3 x 792 3 + 72
=

-250
• Question 8

Work out:

 3 x ( -79)2 3 + 72
=

250
• Question 9

Work out:

 89 + 452 14 × 63
=

2
• Question 10

Work out:

 ( 89 + 45 )2 14 × 63
=

20
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