test review Dec 17th

Front

What is rounding?

Back

Rounding is the process of adjusting a number to make it simpler and easier to work with, while keeping its value close to what it was. For example, rounding 8.54 to the nearest tenth gives 8.5.

Front

When rounding a number, what do you do if the digit to the right of the rounding place is 5 or more?

Back

If the digit to the right of the rounding place is 5 or more, you increase the rounding place by 1.

Front

How do you convert months into years for calculating simple interest?

Back

To convert months into years, divide the number of months by 12.

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal × Rate × Time.

Front

If a laptop costs $850 and the sales tax is 7.5%, how do you calculate the total cost?

Back

Total Cost = Cost + (Cost × Sales Tax Rate). For $850, it is $850 + ($850 × 0.075) = $913.75.

Front

What is the nearest tenth of 5.5694?

Back

The nearest tenth of 5.5694 is 5.6.

Front

What is the purpose of rounding numbers in mathematics?

Back

Rounding numbers simplifies calculations and makes it easier to understand and communicate numerical information.

Front

What is the difference between simple interest and compound interest?

Back

Simple interest is calculated only on the principal amount, while compound interest is calculated on the principal and also on the interest that has been added to it.

Front

How do you round the number 8.54 to the nearest tenth?

Back

Look at the hundredths place (4). Since it is less than 5, you keep the tenths place (5) the same, resulting in 8.5.

Front

What is the sales tax amount on a $850 purchase with a 7.5% tax rate?

Back

Sales Tax = Cost × Sales Tax Rate = $850 × 0.075 = $63.75.