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Directed Numbers

1. Evaluate each of the following.

(a) 13 (10)(b) 7 3

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Solve the following problems.

Palm oil is pumped into an empty tanker at 200 litres per minute. How much palm oil is in the tanker after 5 minutes?

Siti takes 4 vitamin tablets a day from a box of vitamin tablets. How many tablets are eaten by Siti after 30 days?

Find the value for each of the following.

(a) 144 (12)(b) 28 4

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Solve the following problems.

During a TV Quiz open to home viewer, a total of RM2884 was given out in 7 minutes. How much money was given in a minute?

210 m3 water was pumped out from a swimming pool in 12 minutes. How much water was pumped out in 2 minutes?

Find the values for each of the following.

(a)15 (4) + (7)(b)8 + 0 (15)

=

=(c)8 + 2 (10)(d)6 + 5 (1)

=

=(e)4 (2) 17(f)15 (2) (3)

=

=(g)25 2 + (9) 1(h)3 + (8) + (7)

=

=(i)6 + (5) + (7) (4)(j)5 + (8) (9) + 7

=

=

1 Penerbitan Pelangi Sdn. Bhd.6.Find the product for each of the following.

(a) 3 (8) (4)(b)6 (6) 7

=

=7.Compute each of the following.

(a) 168 (7) (4)(b)150 (5) 6

=

=8.Compute each of the following.

(a) 6 (12) 9(b)15 (4) 12

=

=9.Evaluate each of the following.

(a) 7 + 18 (2)(b)19 3 47

=

=

(c) 21 (7) + (12)(d)16 + 0 (15)

=

=

(e) 21 24 (3) 10(f)81 (9) (5) 4

=

=

30 (5) 8 (13)

=

10. Solve the following problems.

(a) (15) is subtracted from (42). The difference is divided by 9. Find the quotient.

(b) Hot-air is pumped into a hot-air balloon at 50 ml per second. Some hot-air leaks out

at 15 m

per second. How much hot-air is there after1

hour?

l

2

11. Complete the following number line.

4

3

2

12. Arrange the following fractions in descending order.

41

1

2

1

1

, 2, 3 , 1 , 2

4

4

5

2

2

13.Evaluate 57

12

+ 12 1 2 and simplify the answer to the lowest term.3

Penerbitan Pelangi Sdn. Bhd.214. Evaluate each of the following and simplify the answers to the lowest term.

(a)31

1(b)7

12(c)1

1

12

1

1

1

8

15

1214

2

8

=

=

=

(d)

7 11(e)8

22(f)161

2

2

24

6

1515

71

4

=

=

=

15. Complete the following number line.

87

16. Arrange the following decimals in ascending order. 3.2, 2.5, 3.6, 4.1, 1.2

17. Evaluate each of the following.

(a)4.1 + (1.6)(b)4.61 (8.32)(c)(6.32) 1.48

=

=

=(d)(2.15) (3.82)(e)0.1 (0.08)(f)3.24 + (8.178)

=

=

=18. Evaluate the following.

(a)1.8 (0.2)(b)4.92 1.2(c)6.3 2.6

=

=

=(d)11.4 (5.7)(e)24.96 (3.2)(f)17.3 0.4

=

=

=

19. Evaluate each of the following.(a) 1.3 7 15

=

20. Evaluate each of the following.(a) 5 3 1.25=

(b)7

+ (6)

15

=

(b)13.5 12

3

=

3 Penerbitan Pelangi Sdn. Bhd.21. Evaluate the following.

(a) 312 (0.7)4 21(b) 4.8111 22 81

5

6

6

3

=

=

22. Mr. Chans shop lost 3.5% of his customers every month for 5 months. After a salespromotion, the customers increased by 2 3 % per month for the next 7 months. What is5 the average change of customers in that year?

Penerbitan Pelangi Sdn. Bhd.4