• NYS Third Grade Math Standards

What will I be able to do as a third grade mathematician?

In operations and algebraic thinking I can ...
-understand multiplication as repeated addition and see objects in groups or sets (5x7 is 5 groups of 7 objects each)
- understand division is repeated subtraction and see objects are shared into equal groups (35 divide by 7 equally means 7 people each get 5 parts)
-use multiplication and division to solve word problems
-draw arrays, equal groups and pictures in multiplication and division word problems
-use fact families to help find an unknown number
-know all your multiplication facts by memory
-solve two step word problems using the four operations (addition, subtraction, multiplication and division)
-identify patterns in numbers and explain them using addition, subtraction, multiplication and division
-identify and reason the distributive, associative, commutative and identity properties of addition and multiplication

In place value I can...
-use place value to round whole numbers to the nearest 10 or 100
-fluently add and subtract numbers in the 1,000 using different methods
-multiply one digit numbers by 10s (3 x 100, 40 x 40, 40 x 1000)

In fractions I can...
-understand that a fraction is a partition made from equal parts of a whole
-understand and show how a fraction is represented on a number line
-understand and show equivalent fractions and compare them
-understand that two fractions are equal if they are the same size
-explain how fractions are equal using pictures or models
-understand that whole numbers can also be shown as fractions (5/5 equals 1 whole)
-compare fractions with the same numerator and denominator (<, >, =)

In measurement and data I can...
-tell and write time to the nearest minute and measure time intervals in minutes
- solve word problems that use addition and subtraction of minutes
- measure and estimate liquid volume and masses using g, kg, and l
- add, subtract, multiply or divide to solve one step problems that use mass or volume
- draw a scaled bar graph or pictograph to show data
-solve one step word problems about graphed data (how many more... how many less)
- measure using a ruler to the nearest inch, half inch and quarter inch
-make a line plot graph that is scaled to the nearest quarter or half inch
-understand area as the measurement of the space inside of a plane shape
-measure area in square units (cm, m, inch and  feet)
- measure the area of a plane shape by counting the units inside a plane area
-understand that area relates to addition and multiplication
- find the area of a rectangle using shapes to cover and then making a multiplication sentence to show how they relate
-solve real world perimeter word problems of polygons

In geometry I can...
-understand that shapes can share attributes (square, rectangle and parallelogram are all quadrilaterals)
-draw various quadrilaterals (square, rhombus, rectangles)
-partition shapes into equal parts and areas.
-understand the area of each part is really a fraction of the whole