Power — Grade 7 Math, what it means and where it is taught
The whole expression, 53, and also its value, 125.
Taught in Grade 7 Math.
Where it is taught
Practise this idea
4 questions in the course bank use Power, in Exponents & Scientific Notation.
Problem 1
Evaluate 70.
Worked answer
1
Follow the pattern down: 72 = 49, 71 = 7, 70 = 1.
Problem 2
Simplify (23)2 and give its value.
Worked answer
64
23 × 2 = 26
= 64
Problem 3
Simplify (23)2 · 2425 and give its value.
Worked answer
32
(23)2 = 26
Top: 26 · 24 = 210
21025 = 25 = 32
Problem 4
Evaluate (-2)4 + (-2)3.
Worked answer
8
(-2)4 = 16 — four negatives, even
(-2)3 = -8 — three negatives, odd
16 + (-8) = 8