Evaluating expressions by substitution

Replace each variable with its value and follow the order of operations.

Standards:6.EE.A.2.c

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

If a = 5 and b = 3, what is the value of 2a² − 4b + 1?

Question 2 of 3

If a = 5 and b = 3, what is the value of 2a² − b + 4?

Question 3 of 3

If m = 4 and n = 2, what is the value of 3m − n² + 5?

How this fits in

Evaluating expressions by substitution is one skill in the Pre-Algebra unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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