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Pre-Algebra Examples

Popular Problems

Evaluate 21-(-18)

$21 - (- 18)$

Step 1

Multiply $- 1$ by $- 18$ .

$21 + 18$

Step 2

Add $21$ and $18$ .

$39$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$

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