## RS Aggarwal Class 7 Solutions Chapter 5 Exponents Ex 5B

These Solutions are part of RS Aggarwal Solutions Class 7. Here we have given RS Aggarwal Solutions Class 7 Chapter 5 Exponents Ex 5B.

**Other Exercises**

- RS Aggarwal Solutions Class 7 Chapter 5 Exponents Ex 5A
- RS Aggarwal Solutions Class 7 Chapter 5 Exponents Ex 5B
- RS Aggarwal Solutions Class 7 Chapter 5 Exponents Ex 5C
- RS Aggarwal Solutions Class 7 Chapter 5 Exponents CCE Test Paper

**Question 1.**

**Solution:**

We can write in standard form

(i) 538 = 5.38 x 10^{2}

(ii) 6428000 = 6.428000 x 10^{6} = 6.428 x 10^{6}

(iii) 82934000000 = 8.2934000000 x 10^{10} = 8.2934 x 10^{10}

(iv) 940000000000 = 9.40000000000 x 10^{11} = 9.4 x 10^{11}

(v) 23000000 = 2.3000000 x 10^{7} = 2.3 x 10^{7}

**Question 2.**

**Solution:**

(i) Diameter of Earth = 12756000 m = 1.2756000 x 10^{7}m = 1.2756 x 10^{7} m

(ii) Distance between Earth and Moon = 384000000 m = 3.84000000 x 10^{8} = 3.84 x 10^{8}

(iii) Population of India in March 2001 = 1027000000 = 1.027000000 x 10^{9} = 1.027 x 10^{9}

(iv) Number of stars in a galaxy = 100000000000 = 1.00000000000 x 10^{11} = 1 x 10^{11}

(v) The present age of universe = 12000000000 years = 1.2000000000 x 10^{10} years = 1.2 x 10^{10} years

**Question 3.**

**Solution:**

The expanded form will be

(i) 684502 = 6 x 10^{5} + 8 x 10^{4} + 4 x 10^{3} + 5 x 10^{2} + 2

(ii) 4007185 = 4 x 10^{6} + 0 x 10^{5} + 0 x 10^{4} + 7 x 10^{3} + 1 x 10^{2} + 8 x 10^{1} + 5 x 10^{0}

(iii) 5807294 = 5 x 10^{6} + 8 x 10^{5} + 0 x 10^{4} + 7 x 10^{3} + 2 x 10^{2} + 9 x 10^{1} + 4 x 10^{0}

(iv) 50074 = 5 x 10^{4} + 0 x 10^{3} + 0 x 10^{2} + 7 x 10^{1} + 4 x 10^{0}

**Question 4.**

**Solution:**

(i) 6 x 10^{4} + 3 x 10^{3} + 0 x 10^{2} + 7 x 10^{1} + 8 x 10^{0}

= 60000 + 3000 + 0 + 70 + 8

= 63078

(ii) 9 x 10^{6} + 7 x 10^{5} + 0 x 10^{4} + 3 x 10^{3} + 4 x 10^{2} + 6 x 10^{1} + 2 x 10^{0}

= 9000000 + 700000 + 0 + 3000 + 400 + 60 + 2

= 9703462

(iii) 8 x 10^{5} + 6 x 10^{4} + 4 x 10^{3} + 2 x 10^{2} + 9 x 10^{1} + 6 x 10^{0}

= 800000 + 60000 + 4000 + 200 + 90 + 6

= 864296

Hope given RS Aggarwal Solutions Class 7 Chapter 5 Exponents Ex 5B are helpful to complete your math homework.

If you have any doubts, please comment below. Learn Insta try to provide online math tutoring for you.