Basic Engineering Mathematics, Fifth Edition

8 Basic Engineering Mathematics

Now try the following Practice Exercise

PracticeExercise 4 Further problems on

order of precedenceand brackets (answers

on page 340)

Evaluate the following expressions.

1. 14+ 3 × 15


2. 17− 12 ÷ 4


3. 86+ 24 ÷( 14 − 2 )


4. 7( 23 − 18 )÷( 12 − 5 )


5. 63− 8 ( 14 ÷ 2 )+ 26

6.

40

5

− 42 ÷ 6 +( 3 × 7 )

7.

( 50 − 14 )

3

+ 7 ( 16 − 7 )− 7

8.

( 7 − 3 )( 1 − 6 )

4 ( 11 − 6 )÷( 3 − 8 )

9.

( 3 + 9 × 6 )÷ 3 − 2 ÷ 2

3 × 6 +( 4 − 9 )− 32 + 5

10.

(

4 × 32 + 24

)

÷ 5 + 9 × 3

2 × 32 − 15 ÷ 3

+

2 + 27 ÷ 3 + 12 ÷ 2 − 32

5 +( 13 − 2 × 5 )− 4

11.

1 +

√

25 + 3 × 2 − 8 ÷ 2

3 × 4 −

√(

32 + 42

)

+ 1

−

( 4 × 2 + 7 × 2 )÷ 11

√

9 + 12 ÷ 2 − 23