Strategize to solve take from with change unknown problems.

EngageNY 60 min(s)

In this lesson, students use various strategies to solve "take from with change unknown" problems. (For example, "There were 11 birds in a tree when I first looked at it. I looked away. When I looked back, there were 5 birds. How many birds flew away?") They begin to recognize that although stories may be "take from with change unknown" problems, they can apply many strategies such as counting on, counting back, taking from ten, or getting to ten to accurately solve this challenging problem type.

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Solve add to with change unknown problems, relating varied addition and subtraction str...

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4 Content Standards are aligned with this lesson

1.OA.A.1
1.OA.B.4
1.OA.C.5
1.OA.C.6

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

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.