Addition and Subtraction of Measuring Length

We will discuss about addition and subtraction of measuring length. We know the measure of length is required to know how tall a boy or a girl is or, how long the cloth is.

Meter is the standard unit of length. If we divide the length of a meter in 100 equal parts, each part is known as a centimeter. Centimeter is also a unit to measure small lengths.

Students use a scale to measure different lengths. Scale (ruler), measuring tape, cloth measuring rod, etc., are made to measure in meters and centimeters. Meters and centimeters are written as ‘m’ and ‘cm’ in brief as 5 m, 8 m, 2.5 cm, 7.5 cm etc.

Relationship between meter and centimeter:

We know one of the 100 parts of a meter is called a centimeter.

So, 1 meter = 100 centimeters

or, 1 m = 100 cm

and, 100 cm = 1 m

Addition and subtraction of measuring length in meter and centimeter:

1. A room is of 6 m length and 4 m breadth.

(i) Find the sum of its length and breadth.

(ii) Find the difference in length and breadth.


(i) Sum = 6 m + 4 m = 10 m

or,                6 m

                +  4 m

                   10 m

Therefore, sum = 10 m

(ii) Difference = 6 m – 4 m = 2 m

or,                 6 m

                 -  4 m

                    2 m

Therefore, difference = 2 m

2. There are two line-segments. One is 8 cm long and other is 5 cm long.

(i) Find the total length of both the line-segments.

(ii) Find the difference between the lengths of the segments.


(i) Total length = 8 cm + 5 cm = 13 cm

or,                 8 cm

                +  5 cm

                  13 cm

Therefore, total length of both the line-segments = 13 cm

(ii) Difference = 8 cm - 5 cm = 3 cm

or,                8 cm

                -  5 cm

                   3 cm

Therefore, difference between the lengths of the segments = 3 cm

3rd Grade Math Worksheets

3rd Grade Math Lessons

From Addition and Subtraction of Measuring Length 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. 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

  2. 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

  3. Perpendicular Lines | What are Perpendicular Lines in Geometry?|Symbol

    Apr 19, 24 04:01 PM

    Perpendicular Lines
    In perpendicular lines when two intersecting lines a and b are said to be perpendicular to each other if one of the angles formed by them is a right angle. In other words, Set Square Set Square If two…

    Read More

  4. Fundamental Geometrical Concepts | Point | Line | Properties of Lines

    Apr 19, 24 01:50 PM

    Point P
    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.

    Read More

  5. What is a Polygon? | Simple Closed Curve | Triangle | Quadrilateral

    Apr 19, 24 01:22 PM

    Square - Polygon
    What is a polygon? A simple closed curve made of three or more line-segments is called a polygon. A polygon has at least three line-segments.

    Read More