Math - place value, missing numbers, + and -

Front

What is place value in mathematics?

Back

Place value is the value of a digit based on its position within a number. For example, in the number 432, the digit 4 is in the hundreds place, so its value is 400.

Front

How do you find the missing number in an equation?

Back

To find the missing number, you can use inverse operations to isolate the variable. For example, if the equation is x + 5 = 10, you would subtract 5 from both sides to find x.

Front

What is the sum of 2 + 2 + 3?

Back

The sum of 2 + 2 + 3 is 7.

Front

How do you add two-digit numbers?

Back

To add two-digit numbers, align the numbers by place value (tens and ones) and add each column, carrying over if necessary.

Front

What is the result of 20 + 2?

Back

The result of 20 + 2 is 22.

Front

How do you subtract numbers?

Back

To subtract numbers, align them by place value and subtract each column, borrowing from the next column if necessary.

Front

What is the value of the digit 7 in the number 572?

Back

In the number 572, the digit 7 is in the tens place, so its value is 70.

Front

What is the difference between addition and subtraction?

Back

Addition is the process of finding the total or sum by combining numbers, while subtraction is the process of finding the difference by taking one number away from another.

Front

How do you represent the number 43 in expanded form?

Back

The number 43 in expanded form is 40 + 3.

Front

What is a missing number problem?

Back

A missing number problem is a mathematical question where one number is unknown and needs to be determined based on the information provided.