Decimals

Exercise 2.6

Question 1:

  1. `0.2 xx 6`

    Answer: `0.2 xx 6 = 1.2`
  2. `8 xx 4.6`

    Answer: `8 xx 4.6 = 36.8`
  3. `2.71 xx 5`

    Answer: `2.71 xx 5 = 13.55`
  4. `20.1 xx 4`

    Answer: `20.1 xx 4 = 80.4`
  5. `0.05 xx 7`

    Answer: `0.05 xx 7 = 0.35`
  6. `211.02 xx 4`

    Answer: `211.02 xx 4 = 844.08`
  7. `2 xx 0.86`

    Answer: `2 xx 0.86 = 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:

(a) `1.3 xx 10`

Answer: `1.3 xx 10 = 13`

(b) `36.8 xx 10`

Answer: `36.8 xx 10 = 368`

(c) `153.7 xx 10`

Answer: `153.7 xx 10 = 1537`

(d) `168.07 xx 10`

Answer: `168.07 xx 10 = 1680.7`


(e) `31.1 xx 100`

Answer: `31.1 xx 100 = 3110`

(f) `156.1 xx 100`

Answer: `156.1 xx 100 = 15610`

(g) `3.62 xx 100`

Answer: `3.62 xx 100 = 362`

(h) `43.07 xx 100`

Answer: `43.07 xx 100 = 4307`

(i) `0.5 xx 10`

Answer: `0.5 xx 10 = 5`

(j) `0.08 xx 10`

Answer: `0.08 xx 10 = 0.8`

(k) `0.9 xx 100`

Answer: 90

(l) `0.03 xx 1000`

Answer: 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`

    Answer: `2.5 xx 0.3 = 0.75`
  2. `0.1 xx 51.7`

    Answer: `0.1 xx 51.7 = 5.17`
  3. `0.2 xx 316.8`

    Answer: `0.2 xx 316 8= 63.36`
  4. `1.3 xx 3.1`

    Answer: `1.3 xx 3.1 = 4.03`
  5. `0.5 xx 0.05`

    Answer: `0.5 xx 0.05 = 0.025`
  6. `11.2 xx 0.15`

    Answer: 1.680
  7. `1.07 xx 0.02`

    Answer: 0.0214
  8. `10.05 xx 1.05`

    Answer: `10.05 xx 1.05 = 10.5525`
  9. `101.01 xx 0.01`

    Answer: `101.01 xx 0.01 = 1.0101`
  10. `100.01 xx 1.1`

    Answer: `100.01 xx 1.1 = 110.011`


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