Subtraction Stories

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Subtraction Stories

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Subtraction Stories

Objective:

Subtraction Stories

instructions

problems

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activity

Remember:

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K.OA.2

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Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.1.OA.1

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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.* *See Glossary, Table 1. 1.OA.6

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Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). ©CSL Associates, Inc. 2010-2015