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`Mathematics`

`A. Number Sense, Concepts, and Operations: `3. The student
understands the effects of operations on numbers and the relationships among
these operations, selects appropriate operations, and computes for problem
solving`.: 6-8: The student...`

`MA.A.3.3.1`` Add Website - Add Activity`

`understands and explains the effects of addition, subtraction, multiplication,
and division on whole numbers, fractions, including mixed numbers, and decimals,
including the inverse relationships of positive and negative numbers.`

Activity: Area vs. Perimeter

`MA.A.3.3.2`` Add Website - Add Activity`

`selects the appropriate operation to solve problems involving addition,
subtraction, multiplication, and division of rational numbers, ratios, proportions,
and percents, including the appropriate application of the algebraic order
of operations.`

`MA.A.3.3.3`` Add Website - Add Activity`

`adds, subtracts, multiplies, and divides whole numbers, decimals,
and fractions, including mixed numbers, to solve real-world problems, using
appropriate methods of computing, such as mental mathematics, paper and
pencil, and calculator.`

Lesson plans for problem solving

http://www2.hawaii.edu/suremath/lessonPlans/lpMenu.html