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Kentucky Standards

Kentucky 3rd Grade Math Standards

All 25 Kentucky math standards for 3rd grade, each explained in plain English. The official wording is in Kentucky Department of Education's document, linked at the end of this page.

25 standards

Operations and Algebraic Thinking

9 standards
KY.3.OA.1
Explain and show what a product of whole numbers means, like 5 × 7 as 5 groups of 7 objects each.
KY.3.OA.2
Explain and show what a quotient means when objects are split into equal shares, like 56 ÷ 8 as sharing 56 things among 8 groups.
KY.3.OA.3
Solve multiplication and division word problems within 100 about equal groups, arrays, and measurements, showing them with drawings and an equation with a blank.
KY.3.OA.4
Find the missing whole number in a multiplication or division equation with three numbers, like 8 × ? = 48.
KY.3.OA.5
Use properties like switching factors, grouping, or breaking a factor apart as shortcuts to multiply and divide, like 8 × 7 as 8 × 5 plus 8 × 2.
KY.3.OA.6
Treat division as finding a missing factor, like solving 32 ÷ 8 by asking what times 8 makes 32.
KY.3.OA.7
Multiply and divide within 100 quickly and accurately using fact families or properties, like knowing 8 × 5 = 40 means 40 ÷ 5 = 8.
KY.3.OA.8
Solve two-step whole-number word problems with any of the four operations, write equations with a letter for the unknown, and check answers with estimation and rounding.
KY.3.OA.9
Spot patterns in numbers, like in addition or multiplication tables, and explain them with properties, like 4 times a number is always even.

Number and Operations in Base Ten

3 standards
KY.3.NBT.1
Round whole numbers to the nearest ten or hundred, like 347 to 350 or to 300.
Common Core 3.NBT.1
KY.3.NBT.2
Add and subtract within 1000 quickly and accurately, using place value and the link between addition and subtraction.
Common Core 3.NBT.2
KY.3.NBT.3
Multiply one-digit numbers by multiples of 10 from 10 to 90, like 9 × 80, using place value and properties.

Number and Operations – Fractions

3 standards
KY.3.NF.1
Understand 1/4 as one of four equal parts of a whole, and 3/4 as three of those parts.
Common Core 3.NF.1
KY.3.NF.2
Place fractions on a number line by splitting 0 to 1 into equal parts, like marking 1/4, and count off those parts to locate fractions such as 3/4.
KY.3.NF.3
Tell when two fractions are equivalent, like 1/2 and 2/4, write whole numbers as fractions, and compare fractions with the same numerator or denominator.
Common Core 3.NF.3

Measurement and Data

8 standards
KY.3.MD.1
Tell and write time to the nearest minute, measure elapsed time in minutes, and solve word problems adding or subtracting minutes within and across the hour.
KY.3.MD.2
Measure and estimate mass in grams and kilograms and liquid volume in liters, and solve one-step word problems with any operation on amounts in the same unit.
KY.3.MD.3
Ask a statistical question about categories, collect data, show it on a scaled picture graph and bar graph, and answer how many more or how many fewer questions.
KY.3.MD.4
Ask a question about number data, measure lengths to the nearest half or quarter inch, show the data on a dot plot, and describe its shape and compare values.
KY.3.MD.5
Understand area as the number of unit squares that cover a flat shape with no gaps or overlaps.
Common Core 3.MD.5
KY.3.MD.6
Find the area of a shape by counting the unit squares that cover it, in square centimeters, meters, inches or feet.
Common Core 3.MD.6
KY.3.MD.7
Find the area of a rectangle by multiplying its side lengths, and find the area of an L-shaped figure by splitting it into rectangles and adding.
Common Core 3.MD.7
KY.3.MD.8
Find a polygon's perimeter from its sides, find a missing side from the perimeter, and draw rectangles with equal perimeters but different areas or the reverse.

Geometry

2 standards
KY.3.G.1
Sort polygons by sides and corners and quadrilaterals by side lengths, see how shared features form larger groups, and spot shapes that do not belong in a group.
KY.3.G.2
Cut a shape into pieces that cover the same amount of space, and describe each piece with a unit fraction, like one of 4 equal parts is 1/4 of the shape.

The official Kentucky documents

The plain-English lines on this page are EMStudio's own explanations of Kentucky's standards, not the official wording, which Kentucky Department of Education publishes in the documents above. Codes and strand names identify each standard.