Decomposing Fractions Activity
Working on fractions? How about trying to teach the common core objective of decomposing fractions? I hope this activity will help you help your kids meet these objectives:
CCSS.Math.Content.4.NF.B.3a Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
CCSS.Math.Content.4.NF.B.3b Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
Although this activity works great for a 4th grade common core, it is also suitable to challenge third graders or for a third grade extension activity when studying fractions. It may also be suitable for a quick review for fifth grade when starting a fraction unit, as well as for math remedial students.
Click on the preview button above to see a picture of what is included.
This will work great as a math mini lesson with sheets to evaluate how well students understand it.
This includes 9 slides. They can be used in a couple of different ways. Although it is an adobe file, you can project it as a slide show. Or, you can use half of it as a slide show and there are 4 sheets that could be used as graded activities.
There is a definition sheet, 4 slides that present colorful fractions, and 4 sheets that have problems to either solve together or print for kids to complete individually. The four slides that present examples have cute fraction images for the students to decompose and find equations that will equal the starting fraction.
Feel free to use this activity in your classroom however you would like.
For other creative lesson ideas, click on 'elementary lesson plans' above.
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