3rd Grade Math (Kentucky Academic Standards)

Operations and Algebraic Thinking (OA)

• KY.3.OA.1 Show and interpret products of whole numbers as equal groups.
• KY.3.OA.2 Show and interpret quotients of whole numbers as equal sharing.
• KY.3.OA.3 Solve multiplication and division word problems within 100 with models and equations.
• KY.3.OA.4 Find the unknown number in a multiplication or division equation.
• KY.3.OA.5 Use properties of operations as strategies to multiply and divide.
• KY.3.OA.6 Understand division as finding an unknown factor.
• KY.3.OA.7 Multiply and divide within 100 fluently using efficient strategies.
• KY.3.OA.8 Solve two-step word problems with the four operations and check reasonableness.
• KY.3.OA.9 Find patterns in arithmetic and explain them with properties of operations.

Number and Operations in Base Ten (NBT)

• KY.3.NBT.1 Round whole numbers to the nearest 10 or 100.
• KY.3.NBT.2 Add and subtract within 1,000 fluently using place-value strategies.
• KY.3.NBT.3 Multiply one-digit numbers by multiples of 10 from 10 to 90.

Number and Operations—Fractions (NF)

• KY.3.NF.1 Understand fractions as built from unit fractions.
• KY.3.NF.2 Understand fractions as numbers on a number line.
  • a. Place a unit fraction by splitting 0 to 1 into equal parts.
  • b. Place other fractions by marking off unit-fraction lengths from 0.
• KY.3.NF.3 Explain equivalent fractions and compare fractions by reasoning about size.
  • a. Know fractions are equivalent if they are the same size or at the same point.
  • b. Make simple equivalent fractions and justify them.
  • c. Write whole numbers as fractions and recognize fractions equal to whole numbers.
  • d. Compare fractions with the same numerator or denominator and record with symbols.

Measurement and Data (MD)

• KY.3.MD.1 Tell time to the minute and solve elapsed-time problems.
• KY.3.MD.2 Measure mass and liquid volume in grams, kilograms and liters.
  • a. Measure and estimate masses and volumes in these units.
  • b. Solve one-step word problems with masses or volumes in the same units.
• KY.3.MD.3 Investigate categorical data with graphs.
  • a. Ask a statistical question and collect categorical data.
  • b. Make scaled picture graphs and scaled bar graphs.
  • c. Draw conclusions, including "how many more" and "how many less".
• KY.3.MD.4 Investigate numerical data with dot plots.
  • a. Ask a statistical question about numerical data.
  • b. Measure lengths to the nearest half and quarter inch.
  • c. Show the measurements on a dot plot with a suitable scale.
  • d. Describe the shape of the data and compare responses.
• KY.3.MD.5 Recognize area as a feature of flat shapes. (being checked)
• KY.3.MD.6 Measure area by counting unit squares, including made-up units.
• KY.3.MD.7 Link area to multiplication and addition.
  • a. Tile rectangles to show area is the product of the side lengths.
  • b. Multiply side lengths to solve area problems.
  • c. Use area to show a × (b + c) = a × b + a × c.
  • d. Add the areas of non-overlapping parts to find a total area.
• KY.3.MD.8 Solve perimeter problems for polygons.
  • a. Find a perimeter from the side lengths.
  • b. Find an unknown side length from the perimeter.
  • c. Draw rectangles with the same perimeter or the same area.

Geometry (G)

• KY.3.G.1 Classify polygons by their features.
  • a. Classify polygons by numbers of sides and vertices.
  • b. Classify quadrilaterals by side lengths and shared features.
  • c. Find shapes that do not belong in a given category.
• KY.3.G.2 Split shapes into parts with equal area and name each part as a unit fraction.