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Pre-Algebra Examples

Popular Problems

Evaluate -21-(-21)

$- 21 - (- 21)$

Step 1

Multiply $- 1$ by $- 21$ .

$- 21 + 21$

Step 2

Add $- 21$ and $21$ .

$0$

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

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