Class 7 Maths | Fractions And Decimals Extra Questions For Practice

CLASS 7 MATHEMATICS | FRACTIONS AND DECIMALS – Extra Questions for practice

Decimals:

Answer the following:

1. Which is greater?
a) 3.03 or 3.30
b) 0.7 or 0.77

2. Express as rupees using decimals:

a) 5 paise
b) 250 paise

3. Express in kg:

a) 300 g
b) 5420 g

4. Write the following decimal numbers in the expanded form:

a) 36.85
b) 3.86

5. Write the place value of 3 in the following decimal numbers:

a) 3.56
b) 14.35

6. How much less is 34 km than 52.45 km?

7. Anu bought 2 kg 300g apples and 4 kg 250 g oranges .Manu bought 3 kg 650 g apples and 3 kg 150g mangoes. Who bought more fruits?

8. The side of an equilateral triangle is 2.5 cm. Find its perimeter?

9. Each side of a regular polygon is 1.6 cm in length. The perimeter of the polygon is 6.4 cm. How many sides does the polygon have?

10. Find:

a) 2.5 x 10
b) 2.5 x 100

ANSWERS:

1. a) 3.30
b) 0.77

2. a) We know that 1 rupees = 100 paise
5 paise = 5/100 = 0.05 rupees
b) 250/100 = 2.50 rupees

3. a) We know that I kg = 1000g
300 g = 300/1000 = 0.3 kg
b) 5420/1000 = 5.420 kg

4. a) 3 x 10 + 6 x 1 + 8 x 1/10 + 5 x 1/100.
b) 3 x 1 + 8 x 1/10 + 6 x 1/100

5. a) Ones
b) Tenths

6. 52.45 – 34 = 18.45 km

7. Weight of apples bought by Anu = 2.300 kg
Weight of Oranges = 4.250 kg
Total weight of fruits = 2.300 + 4.250 = 6.550 kg
Weight of apples bought by Manu = 3.650 kg
Weight of mangoes = 3.150 kg
Total weight of fruits = 3.650 + 3.150 = 6.800 kg.
Manu bought more fruits.

8. The side of an equilateral triangle = 2.5 cm

All the sides of an equilateral triangle are equal.
Perimeter = 3 x 2.5 = 7.5 cm

9. The perimeter of a regular polygon is the sum of the lengths of all its equal sides = 6.4 cm

Length of each side = 1.6 cm
Number of sides = 6.4/1.6 = 4
The polygon has 4 sides.

10. a) 2.5 x 10 = 25
b) 2.5 x 100 = 250