Basic Engineering Mathematics, Fifth Edition

Decimals 21

3. Evaluate 167. 4 × 2. 3


4. Evaluate 342. 6 × 1. 7


5. Evaluate 548. 28 ÷ 1. 2


6. Evaluate 478. 3 ÷ 1 .1, correct to 5 significant
   figures.


7. Evaluate 563. 48 ÷ 0 .9, correct to 4 signifi-
   cant figures.


8. Evaluate 2387. 4 ÷ 1. 5

In Problems 9 to 14, express as decimal fractions
to the accuracy stated.

9.

4

9

, correct to 3 significant figures.

17

27

, correct to 5 decimal places.

11. 1

9

16

, correct to 4 significant figures.

12. 53

5

11

, correct to 3 decimal places.

13. 13

31

37

, correct to 2 decimal places.

14. 8
    9
    13

, correct to 3 significant figures.

15. Evaluate 421. 8 ÷17, (a) correct to 4 signif-
    icant figures and (b) correct to 3 decimal
    places.


16. Evaluate

0. 0147

2. 3

, (a) correct to 5 decimal

places and (b) correct to 2 significant figures.

17. Evaluate (a)

12.

.

6

1. 5

(b) 5.

.

2 × 12

18. A tank contains 1800 litres of oil. How many
    tins containing 0.75 litres can be filled from
    this tank?