Curriculum>Grade 1> Module 1>Topic D: Decomposition Strategies for Subtraction

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Using base 10 cubes, fill in the missing addend and sum for addition equations that sum to 9. Also, use base 10 cubes to fill in missing subtrahend and difference in subtraction equations that start with a minuend of 9

A. Record a scenario based on objects as a subtraction equation with a difference of 0 (Part 1)

B. Record a number line scenario as a -0 subtraction equation

C. Record a number line scenario as a subtraction equation with a difference of 0

D. Identify missing numbers in subtraction equations with a difference of 0

E. Subtract by moving an object backward on a number line and solve a related equation that shows subtraction from 3, 4, or 5

F. Record a number line scenario as an equation that shows subtraction from 3, 4, or 5

G. Record a scenario based on objects as a subtraction equation with a difference of 0 (Part 2)

H. Use base-10 blocks to represent subtraction scenarios with objects within 5 and identify base-10 block patterns that represent subtraction scenarios with objects within 5

I. Solve equations based on a model of base-10 blocks to subtract 1 or all but 1

J. Record a model of base-10 blocks as two related equations that show subtraction from 6

K. Record a model of base-10 blocks as two related equations that show subtraction from 7 or 8

L. Subtract by moving an object backward on a number line and solve a related equation that shows subtraction within 7

M. Record a model of base-10 blocks as two related equations that show subtraction from 9 or 10

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