OPERATIONS ON WHOLE NUMBERS

What is rounding?

• 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.

• Rounding is the method of increasing a number to the nearest whole number only.

• Rounding is the technique of decreasing a number to its lowest value.

• Rounding is the process of converting a number into a fraction.

Which of the following is NOT a whole number: -12/3, 6.0, 12/4, 9?

• -12/3

• 6.0

• 12/4

• 9

What is the result of 432 + 100?

• 430

• 520

• 532

• 540

How do you round a number to the nearest ten?

• Look at the digit in the ones place. If it is 5 or more, round up. If it is less than 5, round down.

• Always round up regardless of the ones place digit.

• Round down if the ones place digit is 4 or less, and round up if it is 6 or more.

• Ignore the ones place and keep the number as is.

How do you round a number to the nearest hundred?

• Look at the digit in the tens place. If it is 5 or more, round up. If it is less than 5, round down.

• Always round up regardless of the tens digit.

• Round down if the tens digit is 4 or less, and round up if it is 6 or more.

• Ignore the tens digit and round based on the hundreds digit.

What is the result of 10 x 5?

• 40

• 45

• 50

• 55

What is the nearest ten of 432?

• 420

• 430

• 440

• 450

What is the result of 100 ÷ 4?

• 20

• 22

• 25

• 30

What is a whole number?

• A number that can be negative or positive.

• A number that includes fractions and decimals.

• A number without fractions or decimals, including zero and positive numbers.

• A number that is always greater than zero.

What is the nearest ten of 972?

• 960

• 970

• 980

• 950