Mental Math Subtraction
What are the strategies to calculate mental math subtraction?
The tricky strategies to calculate subtraction mentally in your head is an important part in mathematics. Year-by-year practicing will help us to learn how to use mental math tricks or techniques in an appropriate way. Tips: practice whenever you get free time in school, at work, etc.,
There are some skills, which are used to solve the questions of subtraction easily and conveniently. Use mental math strategies to calculate subtraction to sharpen your mental maths skills.
Here are some easy examples in which mental subtraction skills are used.
Problems to calculate mental math tricks for subtraction:
1. Subtract 27 from 73.
Solution:
73 – 27
= 73 + 99 – 27 – 99
= 73 + 99 – 27 – 100 + 1
= 73 + (99 – 27) - 100 + 1
= 73 + 72 - 100 + 1
= (73 + 72) – 100 + 1
= 145 - 100 + 1
= 45 + 1
= 46
Therefore, 73 – 27 = 46
For the solution we deduct 27 from the highest two-digit number.
|
99 |
Now 73 is added to 72 (72 + 73 = 145) Again from the sum 100 is deducted and then 1 is added. 72 + 73 → 145 – 100 → 45 + 1 = 46 This 46 is the subtracted result of 73 – 27 |
2. Subtract 93 – 67
Solution:
93 + (99 – 67) – 100 + 1
= 93 + 32 - 100 + 1
= (93 + 32) – 100 + 1
= 125 – 100 + 1
= 25 + 1
= 26
Therefore, 93 – 67 = 26
3. By backward counting subtract 5 from 19.
Solution:
19
- 5
14
19 – 5
= 19 – I, I, I, I, I
18, 17, 16, 15, 14
Therefore, 19 – 5 = 14
4. Find the difference of 53 – 29
Solution:
53 59 → 30 →
- 29 -29 - 6
30 24
Hence, 53
– 29
24
The above tricky strategies will help us to calculate mental subtraction to sharpen the math skills to perform easily.
Related Concepts
From Mental Math 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.
Recent Articles
-
Dividing 3-Digit by 1-Digit Number | Long Division |Worksheet Answer
Apr 24, 24 03:46 PM
Dividing 3-Digit by 1-Digit Numbers are discussed here step-by-step. How to divide 3-digit numbers by single-digit numbers? Let us follow the examples to learn to divide 3-digit number by one-digit nu… -
Symmetrical Shapes | One, Two, Three, Four & Many-line Symmetry
Apr 24, 24 03:45 PM
Symmetrical shapes are discussed here in this topic. Any object or shape which can be cut in two equal halves in such a way that both the parts are exactly the same is called symmetrical. The line whi… -
Mental Math on Geometrical Shapes | Geometry Worksheets| Answer
Apr 24, 24 03:35 PM
In mental math on geometrical shapes we will solve different type of problems on simple closed curves, polygons, basic geometrical concepts, perpendicular lines, parallel lines, circle, terms relates… -
Circle Math | Terms Related to the Circle | Symbol of Circle O | Math
Apr 24, 24 02:57 PM
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… -
Fundamental Geometrical Concepts | Point | Line | Properties of Lines
Apr 24, 24 12:38 PM
The fundamental geometrical concepts depend on three basic concepts — point, line and plane. The terms cannot be precisely defined. However, the meanings of these terms are explained through examples.