1)) Fill in the missing number. 10% of square =10

## Step 1: Identify the Whole<br />### The problem states that $10\%$ of some number equals 10. Let this unknown number be represented by $x$. We need to find $x$.<br />## Step 2: Set Up the Equation<br />### Use the percentage formula: $\text{part} = \frac{\text{percent}}{100} \times \text{whole}$. Here, the part is 10, and the percent is $10\%$. So, $10 = \frac{10}{100} \times x$.<br />## Step 3: Solve for the Whole<br />### Rearrange the equation to solve for $x$: <br />\[ <br />10 = \frac{10}{100} \times x <br />\]<br />Multiply both sides by 100 to eliminate the fraction:<br />\[ <br />1000 = 10x <br />\]<br />Divide both sides by 10 to isolate $x$:<br />\[ <br />x = 100 <br />\]