Forward, Backward: Subtraction as an unknown addend problem within 20

Forward, Backward: Subtraction as an unknown addend problem within 20 Math Game

Purpose

This module shows students that subtraction within 20 can be approached as an unknown addended problem.

Standards Addressed

Standards Body Codes
CCSS-M 1.OA.B.4mb
NCTM PK2.NO.B.7, PK2.NO.B.8
TEKS 1.3D, 1.3F

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