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10 more or less on a 120 chart

Unit 10: Place Value
Lesson 15 of 16

Objective: SWBAT mentally find 10 more or 10 less than a given two-digit number.

Big Idea: Before First Graders are able to solve mentally, they must develop a concrete understanding of 10 less or 10 more than a given two-digit number. This lesson provides my students an opportunity to transition to solving mentally.

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3 teachers like this lesson
Subject(s):
Math, Place Value, addition, subtraction, tens, Tens and Ones
  32 minutes
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