ISEE Middle Level Math : Variables

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #11 : Algebraic Concepts

\(\displaystyle 54m* 6m=\)

Possible Answers:

\(\displaystyle 324m^{2}\)

\(\displaystyle 60m^{2}\)

\(\displaystyle 324m\)

\(\displaystyle 546m^{2}\)

Correct answer:

\(\displaystyle 324m^{2}\)

Explanation:

Multiply the constants and add an exponent to the variable totaling the number of variables in the equation:

\(\displaystyle 54m*6m=324m^{2}\)

Answer: \(\displaystyle 324m^{2}\)

Example Question #12 : Algebraic Concepts

\(\displaystyle 3r^{2}*2r^{2}=\)

Possible Answers:

\(\displaystyle 6r^{4}\)

\(\displaystyle 6r\)

\(\displaystyle 6r^{22}\)

\(\displaystyle 5r^{4}\)

Correct answer:

\(\displaystyle 6r^{4}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 3r^{2}*2r^{2}=6r^{4}\)

Answer: \(\displaystyle 6r^{4}\)

Example Question #13 : Algebraic Concepts

\(\displaystyle 15w^{3}*12w=\)

Possible Answers:

\(\displaystyle 3w^{2}\)

\(\displaystyle 27w^{4}\)

\(\displaystyle 180w^{3}\)

\(\displaystyle 180w^{4}\)

Correct answer:

\(\displaystyle 180w^{4}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 15w^{3}*12w=180w^{4}\)

Answer: \(\displaystyle 180w^{4}\)

Example Question #14 : Algebraic Concepts

\(\displaystyle 17k*11k=\)

Possible Answers:

\(\displaystyle 6k^{2}\)

\(\displaystyle 187k^{2}\)

\(\displaystyle 28k^{2}\)

\(\displaystyle 77k^{2}\)

Correct answer:

\(\displaystyle 187k^{2}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 17k*11k=187k^{2}\)

 

Example Question #15 : Algebraic Concepts

\(\displaystyle 22q*13q^{2}=\)

Possible Answers:

\(\displaystyle 286q\)

\(\displaystyle 286q^{3}\)

\(\displaystyle 286q^{2}\)

\(\displaystyle 35q^{3}\)

Correct answer:

\(\displaystyle 286q^{3}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 22q*13q^{2}=286q^{3}\)

 

Example Question #16 : Algebraic Concepts

\(\displaystyle 7h^{5}*15h^{2}=\)

Possible Answers:

\(\displaystyle 105h^{3}\)

\(\displaystyle 105h\)

\(\displaystyle 105h^{7}\)

\(\displaystyle 22h^{7}\)

Correct answer:

\(\displaystyle 105h^{7}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 7h^{5}*15h^{2}=105h^{7}\)

 

Example Question #17 : Algebraic Concepts

\(\displaystyle 16y* 10y =\)

 

Possible Answers:

\(\displaystyle 26y^{2}\)

\(\displaystyle 160y\)

\(\displaystyle 6y^{2}\)

\(\displaystyle 160y^{2}\)

Correct answer:

\(\displaystyle 160y^{2}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 16y* 10y =160y^{2}\)

Answer: \(\displaystyle 160y^{2}\)

Example Question #18 : Algebraic Concepts

\(\displaystyle 25t^{2}* 11t =\)

Possible Answers:

\(\displaystyle 275t\)

\(\displaystyle 275^{4}\)

\(\displaystyle 275t^{3}\)

\(\displaystyle 26t^{3}\)

Correct answer:

\(\displaystyle 275t^{3}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 25t^{2}* 11t =275t^{3}\)

Answer: \(\displaystyle 275t^{3}\)

Example Question #19 : Algebraic Concepts

\(\displaystyle 4n* 12n =\)

Possible Answers:

\(\displaystyle 8n^{2}\)

\(\displaystyle 16n^{2}\)

\(\displaystyle 48n^{2}\)

\(\displaystyle 48n\)

Correct answer:

\(\displaystyle 48n^{2}\)

Explanation:

Multiply the whole numbers and add the exponents:

\(\displaystyle 4n* 12n =48n^{2}\)

Answer: \(\displaystyle 48n^{2}\)

Example Question #11 : Operations

Simplify the expression:

\(\displaystyle 16q*5q\)

Possible Answers:

\(\displaystyle 21q^{2}\)

\(\displaystyle 80q\)

\(\displaystyle 54q\)

\(\displaystyle 11q^2\)

\(\displaystyle 80q^{2}\)

Correct answer:

\(\displaystyle 80q^{2}\)

Explanation:

The commutative property lets us reorganize the expression.

\(\displaystyle 16q*5q=16*q*5*q=16*5*q*q\)

By separating the whole numbers and the variables, we can easily multiply.

\(\displaystyle 16*5=80\)

\(\displaystyle q*q=q^2\)

\(\displaystyle 16*5*q*q=80*q^2=80q^2\)

\(\displaystyle 16q*5q=80q^{2}\)

Answer: \(\displaystyle 80q^{2}\)

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