Math topics

Pre-algebra

Pre-algebra connects arithmetic to equations: evaluate expressions, distribute, and combine like terms. Tutorai also offers a pre-algebra check-up that stays on your device — it is a screener, not a high-stakes test.

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Open the pre-algebra check-up

Worked example

Problem. Expand: 4(x + 9)

1. Multiply 4 by each term inside the parentheses.
2. 4 × x = 4x and 4 × 9 = 36.
3. Result: 4x + 36.

Answer. 4x + 36

Practice set

1. Practice 1. Expand: 3(x + 2)

   Show answer

   3x + 6

2. Practice 2. Simplify: 2x + 5x

   Show answer

   7x

3. Practice 3. Evaluate 2x + 1 when x = 4

   Show answer

   9

Related pages

• Basic algebra
• Order of operations
• Math for grades 6–8

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