Subscribe to our YouTube channel for the latest videos, updates, and tips.
Home | About Us | Contact Us | Privacy | Math Blog
Check for Subtraction and Addition
We will learn to check for subtraction and addition answers after solving.
We can use addition to check subtraction.
We have learnt that we subtract smaller number from the larger number to find the difference of two numbers. Therefore, to check the answer we can add the difference to the smaller number and if the sum equals to the larger number, our answer is correct.
Let us subtract 9 from 27 and check our answer.
|
2 7 - 9 1 8 |
We add the smaller number to the difference, we get the larger number. |
1 8 + 9 2 7 |
Start with the difference then add the number you subtracted.
Difference of two numbers is correct when the sum of the subtrahend number and the difference is equal to the minuend.
We can say that,
Let us subtract 38 from 96 and check our answer.
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.
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.
3. Checking Subtraction with Addition:
Checking Subtraction using Addition:
4. Subtract 28 from 63 and check the answer.
Solution:
We need to regroup 63 as we cannot subtract 8 from 3.
On taking 1 ten from the tens column,
we get 5 in the tens column and 13 in the ones column.
13 ones - 8 ones = 5 ones and
5 tens - 2 tens = 3 tens.
How do we check if this answer is correct?
The method is simple.
We will add the difference of the two numbers to the number we subtracted.
So, we add 35 to 28.
The answer we get is 63.
This shows that our subtraction was done correctly.
Similarly.
If 96 - 34 = 62 then 34 + 62 = 96
If 67 - 48 = 19 then 48 + 19 = 67
If 20 - 8 = 12 then 8 + 12 = 20
CHECKING SUBTRACTION WITH ADDITION
5. Let us subtract 23 from 49 and check our answer.
Solution:
T O
4 9
- 2 3
2 6
If we add the 'difference' to the 'subtrahend' (the smaller number), we get the 'minuend' (the greater number).
You can use addition to check your answer for subtraction.
Check: Difference + Subtrahend = Minuend
Worksheet on Check for Subtraction and Addition:
1. Subtract and check your answer. One has been done for you.
|
(i) |
T O 5 7 - 1 4 4 3 |
Check T O 1 4 + 4 3 5 7 |
|
(ii) |
T O 5 1 - 4 6
|
Check T O
+
|
|
(iii) |
T O 4 3 - 3 2
|
Check T O
+
|
|
(iv) |
T O 7 1 - 2 6
|
Check T O
+
|
|
(v) |
T O 8 1 - 4 5
|
Check T O
+
|
|
(vi) |
T O 6 4 - 2 1
|
Check T O
+
|
|
(vii) |
T O 2 7 - 1 9
|
Check T O
+
|
|
(viii) |
T O 4 2 - 3 7
|
Check T O
+
|
Answer:
1.
|
(ii) |
T O 5 1 - 4 6 5 |
Check T O 4 6 + 5 5 1 |
|
(iii) |
T O 4 3 - 3 2 1 1 |
Check T O 3 2 + 1 1 4 3 |
|
(iv) |
T O 7 1 - 2 6 4 5 |
Check T O 2 6 + 4 5 7 1 |
|
(v) |
T O 8 1 - 4 5 3 6 |
Check T O 4 5 + 3 6 8 1 |
|
(vi) |
T O 6 4 - 2 1 4 3 |
Check T O 2 1 + 4 3 6 4 |
|
(vii) |
T O 2 7 - 1 9 8 |
Check T O 1 9 + 8 2 7 |
|
(viii) |
T O 4 2 - 3 7 5 |
Check T O 3 7 + 5 4 2 |
2. Subtract and verify:
|
(i) Th H T O 5 2 8 3 - 2 8 8 6 _________________ |
(ii) Th H T O 9 6 1 2 - 4 8 2 5 _________________ |
|
(iii) Th H T O 9 6 1 2 - 4 8 2 5 _________________ |
(iv) Th H T O 6 5 4 4 - 3 3 3 2 _________________ |
|
(iii) Th H T O 6 7 2 3 - 3 2 6 9 _________________ |
(iv) Th H T O 5 6 3 2 - 2 5 9 8 _________________ |
|
(v) Th H T O 7 0 0 0 - 4 0 5 9 _________________ |
(vi) Th H T O 5 3 3 2 - 2 4 5 6 _________________ |
You might like these
Addition & Subtraction Together |Combination of addition & subtraction
We will solve the different types of problems involving addition and subtraction together. To show the problem involving both addition and subtraction, we first group all the numbers with ‘+’ and ‘-‘ signs. We find the sum of the numbers with ‘+’ sign and similarly the sum
Examples on the Formation of Greatest and the Smallest Number |Example
In examples on the formation of greatest and the smallest number we know that the procedure of arranging the numbers in ascending and descending order.
Formation of Greatest and Smallest Numbers | Arranging the Numbers
the greatest number is formed by arranging the given digits in descending order and the smallest number by arranging them in ascending order. The position of the digit at the extreme left of a number increases its place value. So the greatest digit should be placed at the
Estimating Sums and Differences | Estimations | Practical Calculations
For estimating sums and differences in the number we use the rounded numbers for estimations to its nearest tens, hundred, and thousand. In many practical calculations, only an approximation is required rather than an exact answer. To do this, numbers are rounded off to a
Worksheet on Expanded form of a Number | Expanded Form of a Number
Worksheet on expanded form of a number for fourth grade math questions to practice the expanded form according to the place values of its digit. 1. Write the expanded form of the following numbers
Skip Counting Numbers | Method of Skip Counting | Skip Counting
We know skip counting numbers with smaller numbers. Now, we will learn skip counting with larger numbers. Write the number as per following instruction: 1. Write six numbers more after 2,00,000
Magic Square | Add upto 15 | Add upto 27 | Fibonacci Sequence | Videos
In a magic square, every row, column and each of the diagonals add up to the same total. Here is a magic square. The numbers 1 to 9 are placed in the small squares in such a way that no number is repe
Division by 10 and 100 and 1000 |Division Process|Facts about Division
Division by 10 and 100 and 1000 are explained here step by step. when we divide a number by 10, the digit at ones place of the given number becomes the remainder and the digits at the remaining places of the number given the quotient.
Expanded Form of a Number | Writing Numbers in Expanded Form | Values
We know that the number written as sum of the place-values of its digits is called the expanded form of a number. In expanded form of a number, the number is shown according to the place values of its digits. This is shown here: In 2385, the place values of the digits are
Division by Two-Digit Numbers | Knowledge of Estimation | Division
In division by two-digit numbers we will practice dividing two, three, four and five digits by two-digit numbers. Consider the following examples on division by two-digit numbers: Let us use our knowledge of estimation to find the actual quotient. 1. Divide 94 by 12
Related Concept
● Addition
● Check for Subtraction and Addition
● Word Problems Involving Addition and Subtraction
● Estimating Sums and Differences
● Multiply a Number by a 2-Digit Number
● Multiplication of a Number by a 3-Digit Number
● Word Problems on Multiplication
● 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
● Division by Two-Digit Numbers
From Check for Subtraction and Addition to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.
Recent Articles
-
5th Grade Circle Worksheet | Free Worksheet with Answer |Practice Math
Jul 11, 25 02:14 PM
In 5th Grade Circle Worksheet you will get different types of questions on parts of a circle, relation between radius and diameter, interior of a circle, exterior of a circle and construction of circl… -
Construction of a Circle | Working Rules | Step-by-step Explanation |
Jul 09, 25 01:29 AM
Construction of a Circle when the length of its Radius is given. Working Rules | Step I: Open the compass such that its pointer be put on initial point (i.e. O) of ruler / scale and the pencil-end be… -
Combination of Addition and Subtraction | Mixed Addition & Subtraction
Jul 08, 25 02:32 PM
We will discuss here about the combination of addition and subtraction. The rules which can be used to solve the sums involving addition (+) and subtraction (-) together are: I: First add -
Addition & Subtraction Together |Combination of addition & subtraction
Jul 08, 25 02:23 PM
We will solve the different types of problems involving addition and subtraction together. To show the problem involving both addition and subtraction, we first group all the numbers with ‘+’ and… -
5th Grade Circle | Radius, Interior and Exterior of a Circle|Worksheet
Jul 08, 25 09:55 AM
A circle is the set of all those point in a plane whose distance from a fixed point remains constant. The fixed point is called the centre of the circle and the constant distance is known
New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.