Decimals
Exercise 2.6
Question 1:
- `0.2 xx 6`
- `8 xx 4.6`
- `2.71 xx 5`
- `20.1 xx 4`
- `0.05 xx 7`
- `211.02 xx 4`
- `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.
Answer: Area of rectangle = length x breadth
`= 5.7 cm xx 3 cm = 17.1 sq cm`
Question 3: Find the value of following:
- `1.3 xx 10`
- `36.8 xx 10`
- `153.7 xx 10`
- `168.07 xx 10`
Answer: (a) 13, (b) 368, (c) 1537, (d) 1680.7
- `31.1xx100`
- `156.1xx100`
- `3.62xx100`
- `43.07xx100`
- `0.5xx10`
- `0.08xx10`
- `0.9xx100`
- `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:
- `2.5 xx 0.3`
- `0.1 xx 51.7`
- `0.2 xx 316.8`
- `1.3 xx 3.1`
- `0.5 xx 0.05
- `11.2 xx 0.15`
- `1.07 xx 0.02`
- `10.05 xx 1.05`
- `101.01 xx 0.01`
- `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