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Unit 1, Lesson 11

Solve add to with change unknown math stories as a context for counting on by drawing, writing equations, and making statements of the solution.

EngageNY 60 min(s)

This lesson introduces the "add to with change unknown" problem type, where the action, which represents the change, is unknown (for example, "Ben has 5 pencils. He got some more from his mother. Now, he has 9 pencils. How many pencils did Ben get from his mother?"). They use counters or drawing pictures to add more to a starting quantity and learn to count on to determine the unknown part (the number it takes to reach the total).

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Other lessons from Unit 1 in Grade 1 by EngageNY

Previous Lesson

Unit 1, Lesson 10

Solve put together with result unknown math stories by drawing and using 5-group cards.

60 min(s)

Next Lesson

Unit 1, Lesson 12

Solve add to with change unknown math stories using 5-group cards.

60 min(s)

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2 Content Standards are aligned with this lesson

1.OA.A.1
1.OA.C.5

Major StandardsSupporting StandardsAdditional Standards

Standard 1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Part of Major Cluster 1.OA.A

1 Math Practice Standard is aligned with this lesson

Standard MP.2

Reason abstractly and quantitatively.

Prerequisites for 1.OA.A.1

Kindergarten

K.OA.A.2

Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

Upcoming Standards for 1.OA.A.1

1st Grade

1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

1.MD.C.4

Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.

2nd Grade

2.OA.A.1

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

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