Question
Class 7MathematicsExponents and Powers

Find the value of

(a) 30 ÷ 40

(b) (80 – 20) ÷ (80 + 20)

(c) (20 + 30 + 40) – (40 – 30 – 20)

Verified Answer

(a) We have 30 ÷ 40 = 1 ÷ 1 = 1 [∵ a0 = 1]

(b) (80 – 20) ÷ (80 + 20) = (1 – 1) ÷ (1 + 1) = 0 ÷ 2 = 0

(c) (20 + 30 + 40) – (40 – 30 – 20)

= (1 + 1 + 1) – (1 – 1 – 1) [∵ a0 = 1]

= 3 – 1 = 2