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Fractions, Decimals and Rational Numbers > Exercise 2.6

Exercise 2.6

1 Solve the following.

(i)

0.3 x 6

Solution:

=

(ii)

7 x 2.7

Solution:

=

(iii)

2.71 x 5

Solution:

=

(iv)

19.7 x 4

Solution:

=

(v)

0.05 x 7

Solution:

=

(vi)

210.01 x 5

Solution:

=

(vii)

2 x 0.86

Solution:

=

2 Find the area of a rectangle whose length is 6.2 cm and breadth is 4 cm.

Solution:

Formula: Area of a rectangle = length * breadth

Given: Length = 6.2 cm Breadth = 4 cm

Calculation: Area = cm * cm

= cm²

3 Solve the following

(i)

21.3 x 10

Solution:

=

(ii)

36.8 x 10

Solution:

=

(iii)

53.7 x 10

Solution:

=

(iv)

168.07 x 10

Solution:

=

(v)

131.1 x 100

Solution:

=

(vi)

156.1 x 100

Solution:

=

(vii)

3.62 x 100

Solution:

=

(viii)

43.07 x 100

Solution:

=

(ix)

0.5 x 10

Solution:

=

(x)

0.08 x 10

Solution:

=

(xi)

0.9 x 100

Solution:

=

(xii)

0.03 x 1000

Solution:

=

4 A motor bike covers a distance of 62.5 km. Consuming one litre of petrol. How much distance does it cover for 10 litres of petrol?

Solution:

62.5 km/litre x litres

= km

5. Solve the following

(i)

1.5 x 0.3

Solution:

=

(ii)

0.1 x 47.5

Solution:

=

(iii)

0.2 x 210.8

Solution:

=

(iv)

4.3 x 3.4

Solution:

=

(v)

0.5 x 0.05

Solution:

=

(vi)

11.2 x 0.10

Solution:

=

(vii)

1.07 x 0.02

Solution:

=

(viii)

10.05 x 1.05

Solution:

=

(ix)

101.01 x 0.01

Solution:

=

(x)

70.01 x 1.1

Solution:

=

6. Solve the following.

(i)

2.3 ÷ 100

Solution:
{.reveal(when="blank-0")}2.3 ÷ 100 =

(ii)

0.45 ÷ 5

Solution:
{.reveal(when="blank-1")}0.45 ÷ 5 =

(iii)

44.3 ÷ 10

Solution:
{.reveal(when="blank-2")}44.3 ÷ 10 =

(iv)

127.1 ÷ 1000

Solution:
{.reveal(when="blank-3")}127.1 ÷ 1000 =

(v)

7 ÷ 3.5

Solution:
{.reveal(when="blank-4")}7 ÷ 3.5 =

(vi)

88.5 ÷ 0.15

Solution:
{.reveal(when="blank-5")}88.5 ÷ 0.15 =

(vii)

0.4 ÷ 20

Solution:
{.reveal(when="blank-6")}0.4 ÷ 20 =

undefined

7 A side of a regular polygon is 3.5 cm in length. The perimeter of the polygon is 17.5 cm. How many sides does the polygon have?

Solution:

Number of sides = Perimeter / Length of one side Number of sides = cm / cm

Number of sides =

8 A rainfall of 0.896 cm was recorded in 7 hours, what was the average amount of rain per hour?

Solution:

Average rainfall per hour = TotalRainfallTotalhours

= cm/

= cm per hour