Curriculum>Grade 1> Module 2>Topic C: Varied Problems with Decompositions of Teen Numbers as 1 Ten and Some Ones

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Using base 10 number cubes that are arranged in tens and ones columns to reflect the first addend, you will remove cubes from the ones column equal to the subtrahend. After you remove the number cubes, you then identify the final difference

A. Solve substraction equations that include the number 10

B. Complete equations that add or subtract all tens or all ones with and without a model of base-10 blocks

C. Add ones to numbers in the second ten using base-10 blocks

E. Solve +/- equations that use numbers in the second ten and a single-digit number (Part 1)