IXL Math - Oregon fourth-grade math standards

IXL Math

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Oregon

Skills available for Oregon fourth-grade math standards

Oregon math standards: 2007 Oregon Standards (Grades K-6)

Oregon math standards: 2002 Oregon Standards (Grades K-5)

Standards are in black and IXL math skills are in blue. Hold your mouse over the name of a skill to view a sample problem. Click on the name of a skill to practice that skill.

Printable version

4.1 Number and Operations

4.1.1 Extend the base-ten system to read, write, and represent decimal numbers (to the hundredths) between 0 and 1, between 1 and 2, etc.
4.1.2 Use models to connect and compare equivalent fractions and decimals.
4.1.3 Determine decimal equivalents or approximations of common fractions.
4.1.4 Compare and order fractions and decimals.
4.1.5 Estimate decimal or fractional amounts in problem solving.
- Add and subtract decimals: Estimate sums and differences of decimals (Fourth grade - T.9)
4.1.6 Represent money amounts to $10.00 in dollars and cents, and apply to situations involving purchasing ability and making change.

4.2 Number and Operations and Algebra

4.2.1 Apply with fluency multiplication facts to 10 times 10 and related division facts.
4.2.2 Apply understanding of models for multiplication (e.g., equal-sized groups, arrays, area models, equal intervals on the number line), place value, and properties of operations (commutative, associative, and distributive).
4.2.3 Select and use appropriate estimation strategies for multiplication (e.g., use benchmarks, overestimate, underestimate, round) to calculate mentally based on the problem situation when computing with whole numbers.
- Multiplication: Estimate products (Fourth grade - D.6)
- Multiplication: Estimate products: word problems (Fourth grade - D.7)
4.2.4 Develop and use accurate, efficient, and generalizable methods to multiply multi-digit whole numbers.
4.2.5 Develop fluency with efficient procedures for multiplying multi-digit whole numbers and justify why the procedures work on the basis of place value and number properties.
- Multiplication: Multiply a 2-digit number by a 2-digit number: complete the missing steps (Fourth grade - D.8)
- Multiplication: Multiply a 2-digit number by a larger number: complete the missing steps (Fourth grade - D.12)

4.3 Measurement

4.3.1 Recognize area as an attribute of two-dimensional regions.
- Geometry: Area of squares and rectangles (Fourth grade - P.15)
- Geometry: Area of complex figures (with all right angles) (Fourth grade - P.16)
4.3.2 Determine area by finding the total number of same-sized units of area that cover a shape without gaps or overlaps.
- Geometry: Area (Third grade - P.7)
4.3.3 Recognize a square that is one unit on a side as the standard unit for measuring area.
- Geometry: Area (Third grade - P.7)
- Geometry: Area and perimeter of irregular figures (Fifth grade - B.19)
4.3.4 Determine the appropriate units, strategies, and tools to solving problems that involve estimating or measuring area.
- Geometry: Use area and perimeter to determine cost (Fourth grade - P.18)
4.3.5 Connect area measure to the area model used to represent multiplication and use this to justify the formula for area of a rectangle.
- Geometry: Area of squares and rectangles (Fourth grade - P.15)
4.3.6 Find the areas of complex shapes that can be subdivided into rectangles.
- Geometry: Area of complex figures (with all right angles) (Fourth grade - P.16)
4.3.7 Solve problems involving perimeters and areas of rectangles and squares.
- Geometry: Perimeter (Fourth grade - P.14)
- Geometry: Use area and perimeter to determine cost (Fourth grade - P.18)
4.3.8 Recognize that rectangles with the same area can have different perimeters and that rectangles with the same perimeter can have different areas.