Facts about Subtraction

The operation to finding the difference between two numbers is called subtraction. Let us know some facts about subtraction which will help us to learn subtraction of large numbers.

We know that subtraction is taking something away from a group of things. The terms used in subtraction are Minus, Less, Difference, Decrease, Take Away, Deduct. While finding the difference, we write the greater of the two given numbers on the top and them subtract.

When we have to find the difference between two or more numbers we use subtraction.

The sign of subtraction is –.

A number subtracted from itself give zero. i.e.,

8 – 8 = 0

55 – 55 = 0

99 – 99 = 0


Zero subtracted from any number gives the number itself. E.g.,

7 – 0 = 7

46 – 0 = 46

95 – 0 = 95


1. Subtraction with small numbers can be worked out horizontally.

Example: 8 – 5 = 3

              24 – 4 = 20


2. Subtraction with large numbers is worked out vertically. Numbers are written under the place value chart.

Example:             Th    H     T     O

                             8     6     7     2

                       -     5     4     3     2

                             3     2     4     0


3. Zero subtracted from a number does not change the value of the number.

Example:                               H     T     O

                                              2     5     8

                                      +                   0

                                              2     5     8


4. 1 subtracted from a number gives the predecessor of the number as the difference.

Example: 

Subtraction Facts

5. The number from which the other number is to be subtracted is called the minuend. The number subtracted is called the subtrahend and the answer is called the difference.

Example: 

Subtraction Fact

6. If the subtrahend is missing, then the difference is subtracted from the minuend.

Minuend – difference = subtrahend.

Example:

Subtraction Facts of Large Numbers

Workings:

Facts about Subtraction

7. To find the missing minuend, the difference is added to the subtrahend.

Difference + subtrahend = minuend

Example:

Facts about Subtraction Pic

Workings:

Subtraction Facts

Note: Here in workings we did difference + subtrahend = minuend


Subtraction Facts
Subtraction Facts


Subtraction Facts:

If from seven things we take away four things, then three things are arithmetic this is written in a short way as follows:-

7 - 4 = 3

The sign is called the minus sign and shows that the number written after it is to be subtracted, or taken away, from the number written before it

We may read 7 - 4 = 3 as 'seven minus four is equal to three' or 'seven less four is three'.


Example:

A man had 6 goats. He sold 2 of them. How many had he left?

We know that when 2 things are taken from 6 things there are then 4 things left. Therefore the answer to the question is 4 goats.

This subtraction sum may be written down in either of the following ways:


6 - 2 = 4                 or

            6

        -   2 

            4 

You will notice that to subtract 2 from 6 is the same as finding what must be added to 2 to make 6. This is a good way of doing subtraction sums. Thus, in subtracting 2 from 6 you say in your mind '2 and how many more make 6?'

The answer is 4.


Questions and Answers on Facts about Subtraction:

I. Subtract the following –

(i) 8 – 8 = _____

(ii) 6 – 6 = _____

(iii) 5 – 0 = _____

(iv) 3 – 0 = _____

(v) 9 – 3 = _____

(vi) 8 – 3 = _____

(vii) 7 – 1 = _____

(viii) 47 – 47 = _____

(ix) 59 – 59 = _____

(x) 34 – 0 = _____

(xi) 90 – 0 = _____

(xii) 85 – 44 = _____

(xiii) 32 – 21 = _____

(xiv) 65 – 33 = _____


Answer:

I. (i) 0

(ii) 0

(iii) 5

(iv) 3

(v) 6

(vi) 5

(vii) 6

(viii) 0

(ix) 0

(x) 34

(xi) 90

(xii) 41

(xiii) 11

(xiv) 32


II. Subtract the following –

(i) 9 – 9 = _____

(ii) 2 – 2 = _____

(iii) 7 – 0 = _____

(iv) 5 – 0 = _____

(v) 8 – 3 = _____

(vi) 9 – 4 = _____

(vii) 2 – 1 = _____

(viii) 6 – 1 = _____

(ix) 11 – 11 = _____

(x) 36 – 36 = _____

(xi) 72 – 0 = _____

(xii) 22 – 0 = _____

(xiii) 58 – 28 = _____

(xiv) 46 – 23 = _____

(xv) 86 - 35 = _____

(xvi) 78 – 16 = _____


Answer:

II. (i) 0

(ii) 0

(iii) 7

(iv) 5

(v) 5

(vi) 5

(vii) 1

(viii) 5

(ix) 0

(x) 0

(xi) 72

(xii) 22

(xiii) 30

(xiv) 23

(xv) 51

(xvi) 62


III. Solve the following:

(i) 63 – 20 =

(ii) 89 – 53 =

(iii) 50 – 29 =

(iv) 35 – 0 =

(v) 95 – 48 =

(vi) 22 – 8 =

(vii) 53 – 46 =

(viii) 72 – 36 =

(ix) 63 – 20 =

(x) 29 – 29 =

(xi) 72 – 25 =

(xii) 79 – 29 =

(xiii) 52 – 33 =

(xiv) 93 – 49 =

(xv) 76 – 56 =


Answer:

III. (i) 43

(ii) 36

(iii) 21

(iv) 35

(v) 47

(vi) 14

(vii) 7

(viii) 36

(ix) 43

(x) 0

(xi) 47

(xii) 50

(xiii) 19

(xiv) 44

(xv) 20


IV. Solve the puzzle. Subtract to fill the empty boxes:

Subtraction Puzzle


Answer:

IV.

Fill in the Subtraction Puzzle

9, 6, 4 and 5, 4, 3

You might like these




3rd Grade Math Lessons

From Facts about Subtraction 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.



Share this page: What’s this?

Recent Articles

  1. Relation between Diameter Radius and Circumference |Problems |Examples

    Apr 22, 24 05:19 PM

    Relation between Radius and Diameter of a Circle
    Relation between diameter radius and circumference are discussed here. Relation between Diameter and Radius: What is the relation between diameter and radius? Solution: Diameter of a circle is twice

    Read More

  2. Circle Math | Terms Related to the Circle | Symbol of Circle O | Math

    Apr 22, 24 01:35 PM

    Circle using a Compass
    In circle math the terms related to the circle are discussed here. A circle is such a closed curve whose every point is equidistant from a fixed point called its centre. The symbol of circle is O. We…

    Read More

  3. Preschool Math Activities | Colorful Preschool Worksheets | Lesson

    Apr 21, 24 10:57 AM

    Preschool Math Activities
    Preschool math activities are designed to help the preschoolers to recognize the numbers and the beginning of counting. We believe that young children learn through play and from engaging

    Read More

  4. Months of the Year | List of 12 Months of the Year |Jan, Feb, Mar, Apr

    Apr 20, 24 05:39 PM

    Months of the Year
    There are 12 months in a year. The months are January, February, march, April, May, June, July, August, September, October, November and December. The year begins with the January month. December is t…

    Read More

  5. What are Parallel Lines in Geometry? | Two Parallel Lines | Examples

    Apr 20, 24 05:29 PM

    Examples of Parallel Lines
    In parallel lines when two lines do not intersect each other at any point even if they are extended to infinity. What are parallel lines in geometry? Two lines which do not intersect each other

    Read More