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Let’s add and subtract three-digit numbers.

Math Mights was adapted from IM K-5 Math™ ©2021 by Illustrative Mathematics®, released under the Creative Commons Attribution 4.0 International License (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/.

Additions and adaptations are ©2021 by Strategic Intervention Solutions, LLC

Math Mights - 3rd GradeEquivalent Whole Numbers as Fractions
Math Mights - KindergartenMore or Fewer

Related Lessons

  • Math Mights - 1st Grade

    Lesson 206

    Warm up with a Mystery Math Mistake to compare expressions. Make a 10 to help you add. Use a double 10-frame and the "make 10" strategy to add two single-digit numbers.

  • Math Mights - 2nd Grade

    Lesson 206

    Warm up with a Mystery Math Mistake to add 2 two-digit numbers. Explore how many inches there are in a foot. Practice picking the best unit, inches or feet, to measure the length of objects.

  • Math Mights - 3rd Grade

    Lesson 206

    Warm up with a Mystery Math Mistake to find a mistake made in using an algorithm for addition and subtraction. Subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.