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Table of Contents
At the end of the lesson, the student will be able to understand that adding length to an object makes the object longer, and subtracting length from the object will make the object shorter.
See the fact file below for more information on the adding & subtracting lengths or alternatively, you can download our 26-page Measurement and Data: Add & Subtract Lengths CCSS 2.MD.5 worksheet pack to utilise within the classroom or home environment.
Key Facts & Information
LEARNING OBJECTIVE
- At the end of the lesson, the student will be able to understand that adding length to an object makes the object longer, and subtracting length from the object will make the object shorter.
A NOTE FOR THE TEACHER
- When adding and subtracting lengths, take note of the following:
- Make sure you are dealing with measurements with the same unit.
- Remember that adding length makes the object longer; subtracting makes it shorter
- Always label your final answer with the correct unit.
- When giving examples, remind the student whether it is drawn to scale or not.
THEORY
- As we can understand, length can be measured in any tangible object we can hold on to. With the knowledge of units of measurement, we can put value in pretty much any length we want to measure. These values are given by specific measuring devices, from rulers, yardsticks, and even to measuring tapes. We can estimate lengths by knowing what units would be more appropriate to use. We can compare lengths by knowing the difference between the two objectsβ lengths.
- Therefore, it is undoubtedly a fact that we can solve measurements in different situations of everyday use. We can use the values of these lengths in problems concerning addition and subtraction.
- In adding lengths, we will get an answer that is longer than the original length.
- Consider this problem:
- Stacy wants to create one whole stick using the smaller sticks she has. She has 3 sticks in total with lengths of 4 inches, 15 inches, and 32 inches. How long will her stick be if we put all the smaller sticks together?
- Putting something together means adding values to each other. Therefore, as long as we have a constant unit of measurement (here, itβs inches), we can add the three values together and have a sum of 51 inches.
- In subtracting lengths, we will get an answer that is shorter than the original length.
- Consider this problem:
- Ryan the Giant has a 99 cm long loaf of bread. For breakfast, he ate 22 cm from it. For lunch, he ate 23 cm from it. How long will be his bread for dinner?
- We understand that the bread becomes shorter and shorter with every bite Ryan does. We subtract 22 cm and 23 cm from 99 cm; the difference will be 54 cm.
- With these examples, we learn that problems concerning the addition and subtraction of lengths require:
- determining the units of measurement used,
- solving basic addition or subtraction, and
- labeling the final answer with the correct unit.
Measurement and Data: Add & Subtract Lengths CCSS 2.MD.5 Worksheets
This is a fantastic bundle that includes everything you need to know about Measurement and Data: Add & Subtract Lengths across 26 in-depth pages. These are ready-to-use worksheets that align with the Common Core CCSS code 2.MD.5 for Measurement and Data: Add & Subtract Lengths.
Table of contents:
- A lesson plan
- Warm-up activity
- Math theory explained
- Assisted learning activities
- Independent learning activities
- Extension activities and games
- Answer keys
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Link will appear as Measurement and Data: Add & Subtract Lengths CCSS 2.MD.5 Facts & Worksheets: https://kidskonnect.com - KidsKonnect, August 13, 2021
Use With Any Curriculum
These worksheets have been specifically designed for use with any international curriculum. You can use these worksheets as-is, or edit them using Google Slides to make them more specific to your own student ability levels and curriculum standards.