Check for Subtraction and Addition

We will learn to check for subtraction and addition answers after solving.

Difference of two numbers is correct when the sum of the subtrahend number and the difference is equal to the minuend.

Check for Subtraction and Addition Answer


We can say that,


Checking Subtraction


How can you use addition to check the answer of subtraction? How can you use subtraction to check the answer of addition?

Addition (+) and subtraction (-) are opposite operations in math, so you can use one to check the answer of the other one.

For example

1. 2 + 3 = 5

5 - 3 = 2

The first way says, if we start with 2 and add 3, we get 5. The second way says, if we start with 5 and take away 3, we get 2. We are just playing with the same numbers forward and backward.



2.

Check for Addition Answer


Thus, 6476 - 2365 = 4111 is true as 2365 + 4111 = 6476. Similarly, the sum of two numbers is true if the difference between the sum and the first number is equal to the second number, i.e., 2365 + 4111 = 6476 is true as 6476 - 4111 = 2365 or 6476 - 2365 is equal to 4111.

Related Concept

Addition

Word Problems on Addition

Subtraction

Check for Subtraction and Addition

Word Problems Involving Addition and Subtraction

Estimating Sums and Differences

Find the Missing Digits

Multiplication

Multiply a Number by a 2-Digit Number

Multiplication of a Number by a 3-Digit Number

Multiply a Number

Estimating Products

Word Problems on Multiplication

Multiplication and Division

Terms Used in Division

Division of Two-Digit by a One-Digit Numbers

Division of Four-Digit by a One-Digit Numbers

Division by 10 and 100 and 1000

Dividing Numbers

Estimating the Quotient

Division by Two-Digit Numbers

Word Problems on Division


4th Grade Math Activities

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