Understanding that numbers can be decomposed by place value in more than one way lays the foundation for making sense of the regrouping necessary for using the standard algorithm for subtraction. When you regroup to solve 85 – 17, you are really decomposing 85 into 7 tens and 15 ones. Students will be totally engaged when they practice the concept using this I Have/Who Has game!
• 32 I Have/Who Has? cards showing numbers to 1,200 decomposed as the sum of so many thousands, hundreds, tens, and ones (e.g. 350 = 3 hundreds + 4 tens + 10 ones)
• Poster showing ways to show the decomposition of numbers
• 16 bonus cards that can be used in a workstation or for small group instruction to reinforce the idea that numbers can be decomposed in many different ways
Download the preview for complete descriptions of all the activities and teacher notes.
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