Evaluate expressions and formulas

Answer Key - Grade 6 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Ari knows 3x means 3 bars of x. What is 3x when x = 4?

   12
2. 2.

   Bo checks that 5n means 5 bars of n. What is 5n when n = 6?

   30
3. 3.

   Luz draws a bar for 5 + 2x: a part of 5 and 2 bars of x. What is 5 + 2x when x = 3?

   11
4. 4.

   Noah's jar has 30 beads. Each of f friends takes 4, leaving 30 − 4f. The bar of 30 has 4 bars of f cut off. What is 30 − 4f when f = 5?

   10
5. 5.

   Ren knows x² means x × x. What is x² when x = 3?

   9
6. 6.

   Zee picks a square tile with side s = 5 cm, so its area is A = s², which means s × s. What is A?

   25
7. 7.

   Ari has a cube with edge n. Its volume is V = n³, which means n × n × n. What is V when n = 2?

   8
8. 8.

   Bo builds a cube with edge n. Its volume is V = n³, which means n × n × n. What is V when n = 4?

   64
9. 9.

   Esme sees that the parentheses bundle x + 2 into one bar. What is 3(x + 2) when x = 5?

   21
10. 10.

    Jun has a rectangle that is l = 7 cm long and w = 4 cm wide. Its perimeter is P = 2(l + w), and the parentheses bundle l + w. What is P?

    22