**Ohio Education Standards**. Story problems are a set of sentences that give you the
information to a problem that you need to solve. With a story problem, it is your job to figure out whether you will use addition or subtraction to solve the problem. Read More...

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Vocabulary/Answer keyStory Problems

OH.MP. Mathematical Processes: Students use mathematical processes and knowledge to solve problems. Students apply problem-solving and decision-making techniques, and communicate mathematical ideas.

MP.G. Use invented and conventional symbols and common language to describe a problem situation and solution.

OH.NNSO. Number, Number Sense and Operations: Students demonstrate number sense, including an understanding of number systems and operations and how they relate to one another. Students compute fluently and make reasonable estimates using paper and pencil, technology-supported and mental methods.

NNSO.10. Grade Level Indicator: Meaning of Operations: Model, represent and explain addition as combining sets (part + part = whole) and counting on. For example:

NNSO.10.a. Model and explain addition using physical materials in contextual situations.

NNSO.10.b. Draw pictures to model addition.

NNSO.10.d. Explain that adding two whole numbers yields a larger whole number.

NNSO.11. Grade Level Indicator: Meaning of Operations: Model, represent and explain subtraction as take-away and comparison. For example:

NNSO.11.b. Draw pictures to model subtraction.

NNSO.11.d. Explain that subtraction of whole numbers yields an answer smaller than the original number.

NNSO.12. Grade Level Indicator: Meaning of Operations: Use conventional symbols to represent the operations of addition and subtraction.

NNSO.16. Grade Level Indicator: Computation and Estimation: Develop strategies for basic addition facts, such as:

NNSO.16..e Doubles plus or minus one.

NNSO.16.a. Counting all.

NNSO.16.b. Counting on.

NNSO.16.c. One more, two more.

NNSO.16.d. Doubles.

NNSO.16.g. Using tens frames.

NNSO.17. Grade Level Indicator: Computation and Estimation: Develop strategies for basic subtraction facts, such as:

NNSO.17.b. One less, two less

NNSO.17.c. All but one (for example, 8 - 7, 5 - 4)

NNSO.17.d. Using tens frames.

NNSO.G. Model, represent and explain addition as combining sets and counting on.

NNSO.H. Model, represent and explain subtraction as comparison, take-away and part-to-whole.

NNSO.K. Demonstrate fluency in addition facts with addends through 9 and corresponding subtractions.

OH.PFA. Patterns, Functions and Algebra: Students use patterns, relations and functions to model, represent and analyze problem situations that involve variable quantities. Students analyze, model and solve problems using various representations such as tables, graphs and equations.

PFA.D. Model problem situations, using objects, pictures, numbers and other symbols.