Class 7 Maths

# Decimals NCERT Exercise 2.6

Question 1:

1. 0.2 xx 6
2. 8 xx 4.6
3. 2.71 xx 5
4. 20.1 xx 4
5. 0.05 xx 7
6. 211.02 xx 4
7. 2 xx 0.86

Answer: (a) 1.2, (b) 36.8, (c) 13.55, (d) 80.4, (e) 0.35, (f) 844.08, (g) 1.72

Question 2: Find the area of rectangle whose length is 5.7 cm and breadth is 3 cm.

= 5.7 cm xx 3 cm = 17.1  sq  cm

Question 3: Find the value of following:

1. 1.3 xx 10
2. 36.8 xx 10
3. 153.7 xx 10
4. 168.07 xx 10

Answer: (a) 13, (b) 368, (c) 1537, (d) 1680.7

1. 31.1xx100
2. 156.1xx100
3. 3.62xx100
4. 43.07xx100
5. 0.5xx10
6. 0.08xx10
7. 0.9xx100
8. 0.03xx1000

Answer: (a) 3110, (b) 15610, (c) 362, (d) 4307, (e) 5,(f) 0.8, (f) 90, (h) 30

Question 4: A two wheeler covers a distance of 55.3 km in one litre of petrol. How much distance will it cover in 10 litres of petrol?

Answer: Total distance = 55.3 km \xx 10 = 553 km

Question 5: Find the value of following:

1. 2.5 xx 0.3
2. 0.1 xx 51.7
3. 0.2 xx 316.8
4. 1.3 xx 3.1
5. 0.5 xx 0.05
6. 11.2 xx 0.15
7. 1.07 xx 0.02
8. 10.05 xx 1.05
9. 101.01 xx 0.01
10. 100.01 xx 1.1`

Answer: (a) 0.75, (b) 5.17, (c) 63.36, (d) 4.03, (e) 0.025, (f) 1.680, (g) 0.0214, (h) 10.5525, (i) 1.0101, (j) 110.011