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MEAP Preparation - Grade 7 Mathematics
1.140 Powers of Integers I

If 'a' is an integer, the product of a x a x a x a x......x a for n times is denoted by an.

In an,
a is called the base,
n is called the index, and
an itself is called the nth power of a.

Example:
2 x 2 x 2 x 2 is written as 24, where 2 is the base and 4 is the index.

Example:
Write (-2) x (-2) x (-2) as a power.
(-2)3
More Examples:
3 x 3 x 3 x 3 x 3 x 3 = 36
10 x 10 x 10 = 103
(-7) x (-7) x (-7) = (-7)3
(-12) x (-12) x (-12) x (-12) x (-12) = (-12)5


Directions: Choose the correct answer. Also write at least 10 examples of your own.
Q 1: In 1015, what is the index?
10
15
5

Q 2: In 156, what is the base?
15
6

Q 3: In 156, what is the index?
15
22
6

Q 4: 26 is read as ____.
2nd power of 6
6th power of 2

Q 5: (-3)9 is read as ______.
9th power of (-3)
(-3)rd power of 9

Q 6: Write (-2)x(-2)x(-2)x(-2) as a power.
4(-2)
(-2)4

Q 7: In 1715, what is the base?
17
15

Q 8: In (-2)15, what is the base?
-2
15

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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