Exercise 6B
Question 1
1. Write the following amounts in rupees using decimals.
(i) $8 \mathrm{P}$
(ii) $19 \mathrm{P}$
(iii) $75 \mathrm{P}$
(iv) $10 \mathrm{P}$
(v) 7 rupees 43 paise
(vi) 28 rupees 6 paise
(vii) 509 rupees ninety-five paise
(viii) 127 rupees 80 paise
2. Express as centimetres using decimals.
(i) $6 \mathrm{~mm}$
(ii) $9 \mathrm{~mm}$
(iii) $42 \mathrm{~mm}$
(iv) $375 \mathrm{~mm}$
3. Express as metres using decimals.
(i) $7 \mathrm{~cm}$
(ii) $18 \mathrm{~cm}$
(iii) $195 \mathrm{~cm}$
(iv) $1328 \mathrm{~cm}$
4. Express as kilometres using decimals.
(i) $8 \mathrm{~m}$
(ii) $39 \mathrm{~m}$
(iii) $457 \mathrm{~m}$
(iv) $3824 \mathrm{~m}$
5. Using decimal notation express.
(i) $6 \mathrm{~m} \mathrm{} 15 \mathrm{~cm}$ in metres
(ii) $65 \mathrm{~m} \mathrm{} 9 \mathrm{~cm}$ in metres
(iii) $12 \mathrm{~km} 200 \mathrm{~m}$ in kilometres
(iv) $105 \mathrm{~km} 25 \mathrm{~m}$ in kilometres
(v) $829 \mathrm{~cm}$ in kilometres
6. Express as grams using decimals.
(i) $18 \mathrm{mg}$
(ii) $125 \mathrm{mg}$
(iii) $6 \mathrm{mg}$
(iv) $18 \mathrm{~g} \mathrm{} 12 \mathrm{mg}$
(v) $9 \mathrm{~g} 77 \mathrm{mg}$
7. Express as kilograms using decimals. $1^{0^{\circ}}$
(i) $690 \mathrm{~g}$
(ii) $97 \mathrm{~g}$
(iii) $2790 \mathrm{~g}$
(iv) $1700 \mathrm{~g}$
(v) $4 \mathrm{~g}$
(vi) $4 \mathrm{~kg} 25 \mathrm{~g}$
(vii) $23 \mathrm{~kg} \mathrm{} 179 \mathrm{~g}$
(viii) $110 \mathrm{~kg} 8 \mathrm{~g}$
8. Express using decimals.
(i) $5 \mathrm{~mL}$ as litres
(ii) $732 \mathrm{~mL}$ as litres
(iii) $19 \mathrm{~L}$ as kilolitres
(iv) $15 \mathrm{~L} 25 \mathrm{~mL}$ as litres
(v) $4 \mathrm{~kL} 289 \mathrm{~L}$ as kilolitres
Multiple Choice Questions (MCQs)
Tick (✔) the correct option.
9. To change grams into kilograms, we divide by
(a) 100
(b) 10
(c) 1000
(d) 10000
10. 35 litres $17 \mathrm{~mL}$ is equal to
(a) $35.17$ litres
(b) $35.170$ litres
(c) $35.017$ litres
(d) $35.0017$ litres
11. The track used by the first successful steam locomotive was 15300 metres long. How many kilometres long was it?
(a) $153 \mathrm{~km}$
(b) $1.53 \mathrm{~km}$
(c) $15.3 \mathrm{~km}$
(d) $1530 \mathrm{~km}$
12. A cricket pitch is about $264 \mathrm{~cm}$ wide. In metres it is equal to
(a) $26.4 \mathrm{~m}$
(b) $2.64 \mathrm{~m}$
(c) $0.264 \mathrm{~m}$
(d) $0.0264 \mathrm{~m}$
13. The weight of a basket ball is about $600000 \mathrm{mg}$. It is
(a) less than $600 \mathrm{~g}$
(b) greater than $600 \mathrm{~g}$
(c) equal to $600 \mathrm{~g}$
(d) none of these
14. The heights of Jaya, Sabina, Sanju and Rohit are $1.61 \mathrm{~m}, 162 \mathrm{~cm}, 1600 \mathrm{~mm}$ and $1640 \mathrm{~mm}$ respectively. Who is the tallest of them all?
(a) Jaya
(b) Sabina
(c) Sanju
(d) Rohit
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