Practical Problems with Rational Numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

How do you add two rational numbers?

Back

To add two rational numbers, convert them to a common denominator, add the numerators, and simplify if necessary.

Front

What is the process to subtract rational numbers?

Back

To subtract rational numbers, convert them to a common denominator, subtract the numerators, and simplify if necessary.

Front

How do you multiply two rational numbers?

Back

To multiply two rational numbers, multiply the numerators together and the denominators together, then simplify if necessary.

Front

What is the method for dividing rational numbers?

Back

To divide rational numbers, multiply by the reciprocal of the divisor (the second number), then simplify if necessary.

Front

How do you calculate change from a purchase?

Back

To calculate change, subtract the total cost of the items from the amount paid.

Front

What is the formula to find the remaining amount after a purchase?

Back

Remaining amount = Initial amount - Total cost of items.

Front

How do you handle negative numbers in temperature problems?

Back

When dealing with negative numbers in temperature, subtract the absolute value of the drop from the initial temperature.

Front

What is the significance of using decimals in measurements?

Back

Decimals allow for more precise measurements and calculations, especially in contexts like money and volume.

Front

How do you find half of a quantity?

Back

To find half of a quantity, divide the quantity by 2.