Reading Exponents
Examples on evaluating powers (exponents):
1. Evaluate each expression:
(i) 54.
Solution:
54
= 5 ∙ 5 ∙ 5 ∙ 5 → Use 5 as a factor 4 times.
= 625 → Multiply.
(ii) (-3)3.
Solution:
(-3)3
= (-3) ∙ (-3) ∙ (-3) → Use -3 as a factor 3 times.
= -27 → Multiply.
(iii) -72.
Solution:
-72
= -(72)
= -(7 ∙ 7)
= -(49)
= -49
