Reflection: Discourse and Questioning Adding and Subtracting Multiples of Ten - Section 4: Lesson Wrap Up


It is important to continue to have this discussion to connect their thinking to the place value concepts.  In this case, the conversation then turned to the idea of 100 numbers and adding ten to those.  So we looked at what it looks like to add ten to a three digit number.  I hadn't originally thought about turning the conversation to this but the students brought it up and it was a great connection and application of the concept.

  Connecting Their Thinking
  Discourse and Questioning: Connecting Their Thinking
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Adding and Subtracting Multiples of Ten

Unit 12: The Ten Concept: Counting On and Off the Decade and Knowing 10 More/ 10 Less
Lesson 4 of 9

Objective: SWBAT build a two digit number with groups of tens and ones. SWBAT add or subtract a multiple of 10 from a number.

Big Idea: Students will apply the idea of adding or subtracting ten to a number by adding or subtracting multiple groups of ten from a number.

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Math, Number Sense and Operations, 1st Grade, adding and subtracting multiples of 10
  70 minutes
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