Subtraction within 20

Front

What is subtraction?

Back

Subtraction is a mathematical operation that represents the process of taking one quantity away from another. It is the inverse of addition.

Front

What is the result of subtracting a number from itself?

Back

The result of subtracting a number from itself is always zero.

Front

What is the term for the number being subtracted in a subtraction operation?

Back

The term for the number being subtracted is called the 'subtrahend'.

Front

What is the term for the number from which another number is subtracted?

Back

The term for the number from which another number is subtracted is called the 'minuend'.

Front

What is the maximum result of a subtraction operation within 20?

Back

The maximum result of a subtraction operation within 20 is 19, which occurs when subtracting 1 from 20.

Front

What is the minimum result of a subtraction operation within 20?

Back

The minimum result of a subtraction operation within 20 is 0, which occurs when subtracting a number from itself.

Front

How do you check your subtraction answer?

Back

To check your subtraction answer, you can add the result to the subtrahend. If the sum equals the minuend, your subtraction is correct.

Front

What is a common strategy for solving subtraction problems?

Back

A common strategy for solving subtraction problems is to use number lines, counting backward, or using manipulatives like counters.

Front

What is the relationship between addition and subtraction?

Back

Addition and subtraction are inverse operations; knowing one can help you solve the other.

Front

How can you represent subtraction visually?

Back

Subtraction can be represented visually using objects, number lines, or diagrams that show the removal of items from a group.