NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 1: Number System - Fill in the Blanks

Question 101

(a) 1 gram = ? milligrams

1. "Milli" means one-thousandth. So, \(1\text{ mg} = \dfrac{1}{1000}\text{ g}\).
2. If \(1\text{ mg} = \dfrac{1}{1000}\text{ g}\), then multiplying both sides by \(1000\) gives:
3. \(1000\text{ mg} = 1\text{ g}\).
4. Therefore, \(1\text{ g} = 1000\text{ mg}\).

(b) 1 litre = ? millilitres

1. Again, "milli" means one-thousandth. So, \(1\text{ mL} = \dfrac{1}{1000}\text{ L}\).
2. Multiply both sides by \(1000\):
3. \(1000\text{ mL} = 1\text{ L}\).
4. Therefore, \(1\text{ L} = 1000\text{ mL}\).

(c) 1 kilogram = ? milligrams

1. First change kilograms to grams: \(1\text{ kg} = 1000\text{ g}\).
2. Now change grams to milligrams: \(1\text{ g} = 1000\text{ mg}\).
3. So, \(1\text{ kg} = 1000\text{ g} \times 1000\text{ mg per g}\).
4. \(1000 \times 1000 = 1{,}000{,}000\), so \(1\text{ kg} = 1{,}000{,}000\text{ mg}\).
5. In powers of 10: \(1{,}000{,}000 = 10^6\), so \(1\text{ kg} = 10^6\text{ mg}\).