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CanadaON
Grade 9

3.09 Variables and exponents

Worksheet
Multiplication law
1

Simplify:

a
y^{3} \times y^{2}
b
x^{6} \times 8 x^{3}
c
3 y^{6} \times 4 y
d
x^{y} x^{z}
e
a^{7} \times -6 a^{5}
f
-2 a^{4} \times 5 a
g
-b^{7} \times -b^{6}
h
a^{b} a^{c}
i
5y^{5} \times 6y^{3}
j
-8 u^{3} \times -3u
k
-4b^{6} \times -5b^{7}
l
x^{a}x^{b} x^{c}
2

Complete the following statements:

a
b^{4} \times b^{⬚} = b^{7}
b
7 x^{15} \times ⬚ = 35 x^{27}
c
c^{10} \times c^{⬚} = c^{8}
d
4 x^{20} \times ⬚ = 24 x^{25}
Division law
3

Simplify:

a
a^9\div a^5
b
\dfrac{x^{11}}{5 x^{8}}
c
\dfrac{6 m^{15}}{m^{4}}
d
b^6\div b^2
e
\dfrac{j^{9}}{j^{2}}
f
x^{7} \div x^{4}
g
\dfrac{f^{8}}{f^{5}}
h
s^{13}\div s^4
i
\dfrac{4 k^{11}}{2k^{6}}
j
\dfrac{8g^{12}}{g^{5}}
k
6p^{13} \div 2p^{10}
l
15l^8\div 3l^2
4

Complete the following statements:

a
b^{9} \div b^{⬚} = b^{5}
b
x^{⬚}\div x^3=x^2
c
\dfrac{g^⬚}{g^4}=g^7
d
\dfrac{k^7}{k^⬚}=k^3
Power of a power law
5

Consider the expression \left(p^{3}\right)^{2}.

a

State whether the following expressions are equivalent to \left(p^{3}\right)^{2}:

i
\left( p \times p \times p\right) \times \left( p \times p \times p\right)
ii
p^{3} \times p^{3}
iii
\left( p \times p \times p\right)^{2}
iv
p^{3} \times p^{2}
v
\left( p \times p \times p\right) \times \left( p \times p\right)
b

State whether the following equations are true or false:

i
\left(p^{3}\right)^{2} = p^{3 + 2}
ii
\left(p^{3}\right)^{2} = p^{3 \times 2}
c

Complete the following:

\left(p^{3}\right)^{2} = p^{⬚}
6

Simplify:

a
\left(j^{3}\right)^{6}
b
\left(w^{2}\right)^{4}
c
\left(t^4\right)^3
d
\left(3a^4\right)^3
e
\left(5h^7\right)^3
f
\left(xy^2\right)^5
g
\left(\dfrac{2}{h^2}\right)^4
h
\left(\dfrac{a^2}{b^5}\right)^3
i
\left(\dfrac{3x^2}{y^5}\right)^3
j
\left( - x^{9} \right)^{4}
k
\left(-5x^4\right)^3
l
\left(\dfrac{-2a^4}{3b^2}\right)^3
7

Find the value of a and b in the following equation:

\dfrac{v^{18}}{w^{24}} = \left(\dfrac{v^a}{w^{4}}\right)^b

Zero exponent
8

Simplify:

a
18 a^{0}
b
\left(f^{0}\right)^{9}
c
\left(g^{12}\right)^{0}
d
\left( 6 a\right)^{0}
e
8r^0+\left(2q^3\right)^0
f
\left(\dfrac{2}{x^2}\right)^0
g
\dfrac{3r^0}{t^2}
h
8k^0\div\left(4x^2\right)^0
9

Complete the following statements:

a
b^{11} \div b^{11} = b^{⬚}
b
\dfrac{h^{⬚}}{h^{8}} = h^{0}
c
\dfrac{v^{9}}{v^{⬚}} = v^{0}
d
y^⬚\times y^5=y^5
Mixed laws
10

Simplify:

a
\left( x^{6} y^{3}\right)^{4}
b
\dfrac{y^{7} \times y^{6}}{y^{3} \times y^{2}}
c
p^{5} \times \left(p^{4}\right)^{3}
d
\left( 2 y^{2}\right)^{3}
e
m^{5} \div m^{2} \times m^{5}
f
p^{9} \div p^{5} \div p^{2}
g
\left( - 2 x^{3} \right)^{4}
h
\dfrac{6 p^{5} \times 4 p^{7}}{8 p^{3}}
i
\left( 7 x^{2}\right)^{0} - \left( 8 x^{6}\right)^{0}
j
\left( 12 x^{4}\right)^{0} + 12^{0} - 12 h^{0}
k
\left( 4 h^{0}\right)^{2} + 18 \div \left( 3 g^{0}\right)
l
\left(\left(x^{2}\right)^{6}\right)^{5}
m
\left( 4 u^{5} v^{2}\right)^{2}
n
\left( 3 a^{2} b^{5} c\right)^{4}
o
\left( 3 y^{5}\right)^{2} \times \left( 5 y^{2}\right)^{3}
p
\dfrac{\left(x^{4}\right)^{2}}{x^{5}}
q
\dfrac{\left( 2 x^{2} y^{0}\right)^{4}}{x^{5}}
r
\left(c^{10}\right)^{11} \div \left(c^{8}\right)^{3}
s
\dfrac{24 a^{3}}{\left( 2 a\right) \left( 4 b\right)}
t
\left( 10 x^{2} \times 10x^{5}\right)^{0} - 10 x^{0}
u
\dfrac{3^{ 4 a + 2} \times 3^{1 + 6 a}}{\left(3^{3}\right)^{ 3 a - 1}}
v
\dfrac{81^{ 7 a - 4} \times 9^{ 3 a + 2}}{27^{3 - 3 a}}
11

Write \left(16^{p}\right)^{4} in the form a^b, where a is a prime number.

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Outcomes

9.B2.2

Analyse, through the use of patterning, the relationships between the exponents of powers and the operations with powers, and use these relationships to simplify numeric and algebraic expressions.

9.C1.4

Simplify algebraic expressions by applying properties of operations of numbers, using various representations and tools, in different contexts.

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