Unit 5 Rational Number Arithmetic review

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

What does it mean to add a negative number?

Back

Adding a negative number is the same as subtracting its absolute value from the original number.

Front

What is the result of subtracting a negative number from a positive number?

Back

Subtracting a negative number is the same as adding its absolute value.

Front

How do you find the difference between two elevations?

Back

To find the difference between two elevations, subtract the lower elevation from the higher elevation.

Front

What is the height of an object after ascending and descending?

Back

To find the height after ascending and descending, add the ascent to the initial height and then subtract the descent.

Front

If a submarine is at -800 feet and ascends 250 feet, what is its new position?

Back

The new position is -800 + 250 = -550 feet.

Front

What is the total change in position if a submarine descends 300 feet after ascending 250 feet?

Back

The total change is -550 - 300 = -850 feet.

Front

How do you calculate the total change in investment over a period of time?

Back

Multiply the daily change by the number of days. For example, -$7 per day for 7 days is -$49.

Front

What is the difference in elevation between Mt. Everest and the Dead Sea?

Back

The difference is 29,028 feet (Mt. Everest) - (-1,312 feet (Dead Sea)) = 30,340 feet.

Front

How do you calculate the height a drilling rig can reach over time?

Back

Multiply the height per hour by the total hours. For example, -52 feet in 8 hours means -52/8 = -6.5 feet per hour.