Comparing Lengths Using Objects
Basics on the topic Comparing Lengths Using Objects
Standard and Non Standard Measurement
What is the difference between standard and non standard measurements? Standard units of measurement are units that are commonly used to measure such as inches and feet. The next section will explain non standard units of measure.
Non Standard Units of Measurement
What is a nonstandard measurement? Nonstandard units of measurement are units of measurement that are not typically used. Some tools we can use for measurement with nonstandard units are a skateboard, shoe, or in this case pencils, since they are all the same length!
Why is nonstandard measurement important? You may not always have a ruler or measuring tape closeby, however non-standard measurement can help us collect data about length, width, and height.
Non Standard Units of Measurement – Example
What is an example of a non standard unit of measurement? We can use pencils to measure the length of a desk, a book, and a computer screen!
Non Standard Units of Measurement – Measuring
Here is an example of how to use non standard units to measure length and compare using two sandwiches.
First, line up the end of the pencil with the end of the sandwich. We need to make sure the eraser is lined up exactly with the end of the sandwich, so we measure it correctly!
It looks like we need to use more than one, so we line up the ends of the next pencils with no spaces in between.
Now that we’ve measured the sandwiches, let’s compare lengths to see which one is longer!
The peanut butter and jelly sandwich is two pencils long and the nut butter and marshmallow sandwich is three pencils long, so this sandwich is longer!
Non Standard Units of Measurement – Summary
We can use objects around us to help us measure. When measuring with an object such as a pencil:
| Step # | What to do |
|---|---|
| 1 | Line up the end of the pencil with the end of the object, making sure the eraser is lined up exactly with the object, so we measure it correctly! |
| 2 | Ask yourself: “How many pencils long is the object?” |
| 3 | If you need more than one length of a pencil to measure, line up the end of the next pencil with no space in between. |
| 4 | The length we measure with the pencils can be used to compare two objects. |
Want some more nonstandard measurement practice? On this website there is a nonstandard measurement worksheet and interactive exercises and more activities practicing measuring with non standard units.
Transcript Comparing Lengths Using Objects
"Vroom Vroom (...) Beep Beeeeep! "Pssst over here!" "Can I help you? Wait, why is the trash can talking?!" "Nevermind that, it looks like you have some really yummy sandwiches... would you mind if I take a closer look at the LONGER sandwich you have there?" "I guess that's okay... but I'll have to use some pencils to help me measure them since that's all I have here..." Let's help Freddie with "Comparing Lengths using Objects". When finding the length of an object, we are looking for the distance between one end of the object to the other. Here Freddie has two sandwiches and needs to figure out which is longer. He doesn't have a ruler, but we can use the length of different objects around us to help measure... like a skateboard, (...) shoe, (...) or in this case (...) pencils, since they are all the same length! We can use pencils to measure the length of a desk, (...) a book, (...) and a computer screen! (...) Let's start by measuring the peanut butter and jelly sandwich using the length of pencils! First, line up the end of the pencil with the end of the sandwich. We need to make sure the eraser is lined up EXACTLY with the end of the sandwich, so we measure it correctly! It looks like we need to use more than one pencil to measure the sandwich, (...) so we line up the end of the next pencil HERE with no space in between. Now THINK, 'how many pencils long is the sandwich?' (...) The peanut butter and jelly sandwich is two pencils long. Next, we measure the nut butter and marshmallow sandwich using the same pencils. First, line up the end of the pencil with the end of the sandwich. We need to make sure the eraser is lined up EXACTLY with the end of the sandwich, so we measure it correctly! It looks like we need to use more than one, so we line up the ends of the next pencils HERE (...) and HERE with no spaces in between. Now ask yourself, 'how many pencils long is the sandwich?' (...) Let's count together! One, (...) two, (...) three! The nut butter and marshmallow sandwich is three pencils long. Since the peanut butter and jelly sandwich is two pencils long (...) and the nut butter and marshmallow sandwich is three pencils long... this sandwich is LONGER! Freddie gives the nut butter and marshmallow sandwich to the trash can. "Nom nom nom!" Before we see what happens next, let's remember! We can use objects around us to help us measure... like a skateboard, (...) shoe, (...) or in this case (...) pencils, since they are all the same length! When measuring with an object such as a pencil... first, line up the end of the pencil with the end of the object... making sure the eraser is lined up EXACTLY with the object, so we measure it correctly! Then THINK, 'how many pencils long is the object?'. Sometimes we need more than one pencil to measure, so we line up the end of the next pencil HERE with no space in between. The length we measure with the pencils can be used to compare two objects. "Oh! Hello Freddie, I was just..." "Zuri it was you this whole time!? If you wanted some of my sandwich I would have just shared it with you!" To enable screen reader support, press ⌘+Option+Z To learn about keyboard shortcuts, press ⌘slash
"Vroom Vroom (...) Beep Beeeeep! "Pssst over here!" "Can I help you? Wait, why is the trash can talking?!" "Nevermind that, it looks like you have some really yummy sandwiches... would you mind if I take a closer look at the LONGER sandwich you have there?" "I guess that's okay... but I'll have to use some pencils to help me measure them since that's all I have here..." Let's help Freddie with "Comparing Lengths using Objects". When finding the length of an object, we are looking for the distance between one end of the object to the other. Here Freddie has two sandwiches and needs to figure out which is longer. He doesn't have a ruler, but we can use the length of different objects around us to help measure... like a skateboard, (...) shoe, (...) or in this case (...) pencils, since they are all the same length! We can use pencils to measure the length of a desk, (...) a book, (...) and a computer screen! (...) Let's start by measuring the peanut butter and jelly sandwich using the length of pencils! First, line up the end of the pencil with the end of the sandwich. We need to make sure the eraser is lined up EXACTLY with the end of the sandwich, so we measure it correctly! It looks like we need to use more than one pencil to measure the sandwich, (...) so we line up the end of the next pencil HERE with no space in between. Now THINK, 'how many pencils long is the sandwich?' (...) The peanut butter and jelly sandwich is two pencils long. Next, we measure the nut butter and marshmallow sandwich using the same pencils. First, line up the end of the pencil with the end of the sandwich. We need to make sure the eraser is lined up EXACTLY with the end of the sandwich, so we measure it correctly! It looks like we need to use more than one, so we line up the ends of the next pencils HERE (...) and HERE with no spaces in between. Now ask yourself, 'how many pencils long is the sandwich?' (...) Let's count together! One, (...) two, (...) three! The nut butter and marshmallow sandwich is three pencils long. Since the peanut butter and jelly sandwich is two pencils long (...) and the nut butter and marshmallow sandwich is three pencils long... this sandwich is LONGER! Freddie gives the nut butter and marshmallow sandwich to the trash can. "Nom nom nom!" Before we see what happens next, let's remember! We can use objects around us to help us measure... like a skateboard, (...) shoe, (...) or in this case (...) pencils, since they are all the same length! When measuring with an object such as a pencil... first, line up the end of the pencil with the end of the object... making sure the eraser is lined up EXACTLY with the object, so we measure it correctly! Then THINK, 'how many pencils long is the object?'. Sometimes we need more than one pencil to measure, so we line up the end of the next pencil HERE with no space in between. The length we measure with the pencils can be used to compare two objects. "Oh! Hello Freddie, I was just..." "Zuri it was you this whole time!? If you wanted some of my sandwich I would have just shared it with you!" Turn on screen reader support
Comparing Lengths Using Objects exercise
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Which sandwich has been measured correctly?
HintsRemember that the pencils need to be lined up end to end, with no gap in between them.
Have the pencils been placed from the very start to the very end of the sandwich?
SolutionThe correct option is this one as it has:
- The pencils lined up, starting from the very start of the sandwich and going right to the very end of the sandwich.
- No space in between each pencil.
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Which sandwich is the longest?
HintsRemember that Freddie wants the longest sandwich.
The longest sandwich is the one that needs the most pencils to measure it.
SolutionThe longest sandwich is 7 pencils long. The others are shorter because they are:
- 3 pencils long
- 4 pencils long
- 5 pencils long
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Which pile of cars should Freddie use?
HintsTo make it a fair measurement, the toy cars should be exactly the same size.
Does it matter whether the toy cars are the same color?
SolutionTo measure the box of chocolate brownies, Freddie should use the pile of cars that are all the same size, so that the measurement is fair and accurate.
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Measuring flowers.
HintsTo find how tall the flower is, count the cars.
The tallest flower is the one with the most cars.
SolutionThis image shows the height of each flower when measured using the toy cars.
We can see that the shortest flower is the snowdrop as it only 2 cars high, and the tallest flower is the sunflower as it is 10 cars high.
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How long is each snack?
HintsCount how many pencils are used to measure the item. This is its length.
This sandwich is 2 pencils long.
Solution- The half sandwich is 4 pencils long.
- The whole sandwich is 5 pencils long.
- The hotdog is 6 pencils long.
- The sushi is 3 pencils long.
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Ordering picnic foods by height.
HintsStart with the item that is the shortest. This means that it will have the fewest gem stones to measure it.
Look at the heights of each item to decide the order from smallest to largest. You could use a number line to help you.
SolutionIn order of height from shortest to tallest, the items were:
- yogurt (4 gemstones high).
- juice carton (8 gemstones high).
- pineapple (12 gemstones high).
- water bottle (15 gemstones high).
