Math Review

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another. For example, in 605 - 289, you are taking 289 away from 605.

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to the nearest ten, hundred, etc. For example, 204 rounded to the nearest hundred is 200.

Front

What is the rule for rounding numbers?

Back

If the digit after the rounding place is 5 or more, round up. If it's less than 5, round down.

Front

What is a fraction?

Back

A fraction represents a part of a whole. It is written as 'a/b' where 'a' is the part and 'b' is the whole.

Front

What does the numerator in a fraction represent?

Back

The numerator is the top number in a fraction and represents how many parts you have.

Front

What does the denominator in a fraction represent?

Back

The denominator is the bottom number in a fraction and represents the total number of equal parts.

Front

What is the value of a digit in a number?

Back

The value of a digit depends on its position in the number. For example, in 394, the 9 is in the tens place, so its value is 90.

Front

How do you find the value of a digit in a number?

Back

To find the value of a digit, multiply the digit by the place value it represents. For example, 9 in 394 is 9 x 10 = 90.

Front

What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another. For example, the difference between 605 and 289 is 316.

Front

What is an example of rounding two numbers to the same value?

Back

38 and 41 both round to 40 when rounding to the nearest ten.