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 =
=
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
=
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 =
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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 =
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 =
=
=