Students can Download Maths Chapter 10 Exponents Ex 10.7 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 8 Maths helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

## Karnataka Board Class 8 Maths Chapter 10 Exponents Ex 10.7

Question 1.

Use the laws of exponents and simplify

Answer:

Question 2.

What is the value of \(\frac{\left(10^{3}\right)^{2} \times 10^{-4}}{10^{2}}\)

Answer:

Question 3

Simplify:

\(\left[\frac{b^{-3} \cdot b^{7} \cdot\left(b^{-1}\right)^{2}}{(-b)^{2}\left(b^{2}\right)^{3}}\right]^{-2}\)

Answer:

Question 4.

Find the value of each of the following expressions.

(a). (3^{2})^{2} – (-2)^{3})^{2 }– (-(5)^{2})^{2
}= 3^{4} – (- 2 x – 2 x – 2)^{2} – (-5^{2} )^{2
}= 3^{4} – (-2^{3})^{2} – 5^{4
}= 81 – 2^{6} – 625

= 81- 64 – 625

= 81 – 689

= – 608

(b). ((0.6)^{2})^{0 }– ((4.5)^{0})^{-2}

= (0.6)^{2 x 0} – (4.5)^{0 x -2
}= (0.6)^{0} – (4.5)^{0}

= 1 – 1

= 0

(c).