Evaluate expressions with fractions, decimals, absolute value and roots

Answer Key - Grade 9 Math Worksheet - Building Confidence

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

1. 1.

   Ari's card (guarded by one proud pencil) shows 6x + 1/2. Put in x = 2/3: 6 × 2/3 + 1/2. What is its value?

   9/2
2. 2.

   Bo's card shows 4x + 1/3. Put in x = 3/4: 4 × 3/4 + 1/3. What is its value?

   10/3
3. 3.

   Jun's card shows 8x + 2/3. Put in x = 5/8: 8 × 5/8 + 2/3. What is its value?

   17/3
4. 4.

   Milo's fraction has 5x + 6 on the top and 8 on the bottom. Do the whole top first. What is its value when x = 6?

   4.5
5. 5.

   Noah's fraction (with a tiny hat on top) has 6x − 4 on the top and 10 on the bottom. Do the whole top first. What is its value when x = 4?

   2
6. 6.

   Pia puts x = −2 into |x − 6| (while a snail watches). The first line is (−2) − 6. Work the inside, then the bars. What is the value?

   8
7. 7.

   Ren puts x = −7 into |x + 3|. The first line is (−7) + 3. Work the inside, then the bars. What is the value?

   4
8. 8.

   Bo's card shows ∛x − 1. The root asks which number times itself three times makes x. What is its value when x = 27?

   2
9. 9.

   Esme's card shows √x − 2. The root asks which number times itself makes x. What is its value when x = 64?

   6
10. 10.

    Jun's card shows ∛x + 4. The root asks which number times itself three times makes x. What is its value when x = 216?

    10