Which lines are millimeters on a ruler

If you plan on measuring things that are small or you need to be extremely accurate, make sure the ruler you use has these marks.

Method 2. Get a metric ruler. A metric ruler is based on the International System of Units SI , sometimes called the metric system, and is divded into either millimeters or centimeters instead of inches.

Rulers are often 30 centimeters long, which are designated by large numbers on the ruler. Between each centimeter cm mark, there should be 10 smaller marks called millimeters mm. If you are measuring an object, align it with the left side of the zero mark on the ruler. The left side of the line where the object ends will be its measurement in centimeters. This way the line thickness will not affect the measurement. Unlike with the English ruler, the measurements for the metric ruler are written in decimals instead of fractions.

Learn the centimeter marks. The large numbers next to the longest lines on the ruler denote the centimeter marks. A metric ruler has 30 of these marks. For example, place the bottom of a crayon on the far left side of the ruler to measure it. Note where the tip falls. If the crayon ends directly on the long line next to the large number 14, your crayon is exactly 14cm long. There are a total of 60 of these marks on a 30 cm ruler. Your button is 1.

For example, to measure 0. Learn the millimeter marks. Between each 0. There are a total of 10 lines per centimeter, with the 0. There are millimeter marks on a 30 cm ruler. The Therefore, Not Helpful Helpful Yes, but it really depends on what type of ruler you want to learn as well as how fast you pick up new material. Each small line represents 1mm. Therefore, the first line past the big number for instance 25 will represent Not Helpful 93 Helpful The centimeters side is usually the part of the ruler where the markers are shorter and closer together.

It reads cm, and has more numbers. It's in the middle between the 7th and 8th millimeter lines in a centimeter. In other words, it ends in the middle of the second half of a centimeter. Not Helpful 88 Helpful Quarter inches have lines halfway between them to indicate eighth inches also. Examine the metric side of the ruler on the opposite edge. The metric side of the ruler has centimeter numbers from 1 on the far left up to 30 on the far right.

The final metric point on the ruler is The longest lines at each centimeter number indicate the centimeters along the edge of the ruler. Find the shorter millimeter lines between each longer centimeter line. Each centimeter has 10 equal parts, with nine shorter lines representing the millimeters.

At the halfway point between each centimeter, find a slightly longer millimeter line indicating the halfway point between each centimeter. Determine the English and metric equivalents by comparing the measurements using both sides of the ruler.

We can use millimetres to measure things smaller than one centimetre or to measure things more accurately. We can see that 10 millimetres is the same length as one centimetre. We still measure objects starting from the zero line on our ruler. One millimetre 1 mm is one tenth of one centimetre 1 cm.

Each centimetre is worth 10 mm. We can count up in centimetres with each centimetre worth 10 mm. To measure the key, we line its left hand side up with the zero line on the ruler. The key is larger than 40 mm but less than 50 mm, since the end is between 4 and 5 cm.

We count on in millimetres from 40 mm until we reach the right end of the key. There are 3 small lines after the 4 cm mark and so, the length is 3 mm more than 40 mm. The key is 43 mm long. Download PDF. A millimetre is a measurement of length, which is one tenth of a centimetre long.

There are millimetres in one metre and ten millimetres in one centimetre. A 12 inch ruler is about 30 cm long. How big is a centimeter actual size? In 1 inch there are 2. To convert inches to centimeters, multiply the number of inches by 2. Thus, 9. How do you read a micrometer? To read the micrometer in thousandths, multiply the number of vertical divisions visible on the sleeve by 0.

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