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ToggleNCERT Solution For Class 6, Maths, Chapter 1, Knowing Our Numbers, Exercise 1.1 given below.

# Chapter 1, Knowing Our Numbers, Exercise 1.1

**Q.1. Fill in the blanks:**

**(a) 1 lakh = _______ ten thousand.**

**(b) 1 million = _______ hundred thousand.**

**(c) 1 crore = _______ ten lakh.**

**(d) 1 crore = _______ million.**

**(e) 1 million = _______ lakh.**

**Ans: **(a) 1 lakh = 10 ten thousand = 1,00,000

(b) 1 million = 10 hundred thousand = 10,00,000

(c) 1 crore = 10 ten lakhs = 1,00,00,000

(d) 1 crore = 10 million = 1,00,00,000

(e) 1 million = 10 lakh = 1,000,000

**Q.2. Place commas correctly and write the numerals:**

**(a) Seventy three lakh seventy five thousand three hundred seven.**

**(b) Nine crore five lakh forty one.**

**(c) Seven crore fifty two lakh twenty one thousand three hundred two.**

**(d) Fifty eight million four hundred twenty three thousand two hundred two.**

**(e) Twenty three lakh thirty thousand ten.**

**Ans: **(a)73,75,307

(b) 9,05,00,041

(c) 7,52,21,302

(d) 5,84,23,202

(e) 23,30,010

**Q.3. Insert commas suitably and write the names according to Indian System of Numeration: (a) 87595762 (b) 8546283 (c) 99900046 (d) 98432701**

**Ans: **(a) 8,75,95,762 : Eight crore seventy five lakh ninety five thousand seven hundred sixty two.

(b) 85,46,283: Eighty five lakh forty six thousand two hundred eighty three.

(c) 9,99,00,046: Nine crore ninety nine lakh forty six.

(d) 9,84,32,701: Nine crores eighty four lakh thirty two thousand seven hundred one.

**Q.4. Insert commas suitably and write the names according to International System of Numeration :**

**(a) 78921092 (b) 7452283 (c) 99985102 (d) 48049831**

**Ans: **(a) 78,921,092: Seventy eight million nine hundred twenty one thousand ninety two.

(b) 7,452,283: Seven million four hundred fifty-two thousand two hundred eighty three.

(c) 99,985,102: Ninety-nine million nine hundred eighty five thousand one hundred two.

(d) 48,049,831: Forty-eight million forty-nine thousand eight hundred thirty-one.