1.4 Numbers to 99 · Lesson 12: Mentally Add and Subtract Tens (optional)

1.4 Numbers to 99 · Lesson 12: Mentally Add and Subtract Tens (optional)Math · Grade 1 Math · Grade 1Lesson plan

Learning goals: Teacher Facing Mentally find 10 more or 10 less than a number. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 1.4 Numbers to 99, Grade 1.

From Illustrative Mathematics (IM Certified curriculum, im.kendallhunt.com) · CC BY 4.0 · original source

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