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Why does decomposing numbers help with addition

WHY DOES DECOMPOSING NUMBERS HELP WITH ADDITION HOW TO
WHY DOES DECOMPOSING NUMBERS HELP WITH ADDITION SERIES

When a student can’t fluently provide the missing part, that becomes the students “working number.” For example, if a student cannot provide 4 as the missing part of 6 when 2 is shown, 6 becomes the student’s working number. The teacher continues to move through numbers, checking the student’s fluency at each number.

If the student can quickly provide each missing part, the teacher can move on and assess their fluency of the number 5. Beginning with the number 4, the teacher assesses that the student can fluently provide the missing part for all combinations of 4. Kathy Richardson refers to this activity as the Hiding Assessment. I quickly put the cubes back in the bag, and pull out a different number to see if the student can identify a new missing part. By seeing four cubes outside of the bag, they need to identify the number two as the missing part. I have six cubes and hide some in the bag. For example, take a look at the picture above. Essentially you are looking to assess a student’s ability to provide the missing part of a whole. You can use a bag, cup, or even just your hand- the idea stays the same.

Share a quick and easy assessment to use at every level in your classroomīeing able to assess your students quickly and at any point during your math block is such a luxury! That is why I LOVE the “In the Bag” assessment!.

How introducing choice can both engage your students and decrease your planning time.

WHY DOES DECOMPOSING NUMBERS HELP WITH ADDITION HOW TO

Describe how to easily differentiate each center.Share how recording pages hold students accountable for their learning, and help you monitor their understanding.Explore some of my favorite LOW-PREP centers and activities.That’s why today I want to do the following to help make this as easy to take back to your classroom as possible: You’re saying, ‘well that’s great Jillian, but I don’t have time to plan those experiences, prep all of the materials, differentiate to meet the needs of all learners, and assess for student growth!’ Trust me when I say, “I FEEL YOU!” It’s important to regularly provide a variety of experiences to help students increase their fluency, and think flexibly about numbers. The ability to fluently compose and decompose numbers is a critical step in mathematical thinking.

WHY DOES DECOMPOSING NUMBERS HELP WITH ADDITION SERIES

I am so excited for this Summer Math Series to start! I’m beginning with one of my favorite concepts to teach: Number Sense! More specifically, I want to take a look at building fluency with composing and decomposing numbers.