Measuring Lengths | Elementary

Measuring length means finding its size.

1. I place the first object at the beginning of the length being measured.

2. I place the objects one after the other, without leaving a space, until the end of the length. I must place the objects in a straight line along the length being measured.

3. To find the total length, I count the number of objects used.

Measure this line using tissue boxes.

I place the first object at the beginning of the length being measured.
I place the objects one after the other, without leaving a space, until the end of the length. I must place the objects in a straight line along the length being measured.
To find the total length, I count the number of objects used. In this picture, the total length is six tissue boxes.

This line measures 6 tissue boxes.

1. I place the object at the beginning of the length being measured. I draw a little line at the end of the object so I know where to place it next.

2. I move the object to where I drew the line.

3. I repeat step 2 until the end of the length I am measuring.

4. To find the total length, I count the number of times I moved the object.

Measure this line using tissue boxes.

I place the object at the beginning of the length being measured. I draw a little line at the end of the object so I know where to place it next.
I move the object to where I drew the line.
I repeat step 2 until the end of the length I am measuring.
To find the total length, I count the number of times I moved the object.

This line measures 3 tissue boxes.

Some rulers do not have a 0. The first line represents 0.

1. I place the ruler along the length being measured. I ensure that the 0 mark is at the beginning of the length.

2. To find the total measurement, I look at the line on the ruler where the measurement ends.

What is the measurement of the following line in cm?

I place the ruler along the length being measured. I make sure that the 0 mark is at the beginning of the length.
To find the total measurement, I look at the line on the ruler where the measurement ends.

The line measures 7 cm.

On a ruler, 1 mm looks like the following.

The 5 mm mark is a bit longer so that it can be found more easily.

1. I place the ruler along the length being measured. I make sure that the 0 mark is at the beginning of the length.

2. To find the total measurement, I look at the line on the ruler where the measurement ends.

What is the length of the following line in mm?

I place the ruler along the length being measured. I make sure that the 0 mark is at the beginning of the length.
To find the total measurement, I look at the line on the ruler where the measurement ends.

The line measures 4 mm.

1. To measure length in decimals, I look at the cm.

2. Next, I look at the mm.

What is the measurement of the following line in cm?

To measure length in decimals, I look at the cm. Since the measurement exceeds the 7 cm line but does not reach the 8 cm line, I know that the whole part of my answer is 7.
Next, I look at the mm. Since the length of the line ends at 4 mm after the 7, the answer is 7.4 cm, which is equivalent to 74 mm.

The line measures 7.4 cm.