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

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Fill in addends and sums in equations that add up to 7 or 8 given a scneario illustrated by base 10 cubes. Students will then complete two subtraction equations using 7 or 8 and the addends from the first equation

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

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

N. Identify missing numbers in subtraction equations from 9

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