Curriculum>Grade 1> Module 1>Topic E: Subtraction as an Unknown Addend Problem

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Students learn that the minus sign represents "taking away". They identify minus and equals signs. Then, they rewrite "taking away" scenarios as a subtraction equation

A. Explore the concept of "taking away" with concrete objects

C. Complete subtraction number sentences using concrete objects

D. Match sets of cubes to real objects to model "taking away"

E. Complete subtraction number sentences using a cube model

F. Compose and solve subtraction equations

G. Take away cubes to match and solve a subtraction equation

H. Solve subtraction equations within 7

I. Write a full subtraction equation to match a cube model

J. Use cubes to model subtraction from 8, 9, and 10

K. Solve subtraction equations from 8, 9, and 10

L. Solve subtraction equations within 10

M. Addition and subtraction as types of expressions

N. Sort expressions into addition and subtraction

O. Complete number bonds and relate them to subtraction number sentences

P. Explore how addition and subtraction equations are related through number bonds

Q. Identify the missing parts of related addition and subtraction facts

R. Identify members of a fact family from a given set of equations

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