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.

   Kira plants a garden that is l meters long and w meters wide. Its area is A = lw, which means l × w. What is A when l = 6 and w = 4?

   24
4. 4.

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

   11
5. 5.

   Milo walks 2 km, then 3 km each hour: after t hours, distance D = 2 + 3t. Bar: a part of 2 and 3 bars of t. What is D when t = 4?

   14
6. 6.

   Pia cuts 3 bars of x off a bar of 20. What is 20 − 3x when x = 4?

   8
7. 7.

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

   9
8. 8.

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

   8
9. 9.

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

   64
10. 10.

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

    21