Third-Grade Mathematics Standards

thirds-grade-mathParents of third-graders must support their children as they tackle brand new skills and help to form good study habits. Your child is introduced to math milestones: multiplication, division, and fractions. Here are some examples of the skills he or she will practice in third-grade math, along with useful questions to ask your son or daughter’s teacher, and strategies for helping him or her learn at home.

Operations and Algebraic Thinking

  1. Understand the meaning of multiplication and how it relates to addition.
    6 × 3 = 18 is the same as 6 + 6 + 6 = 18
  2. By the end of third grade, learn multiplication tables and use them from memory.
  3. Understand division as a separation of numbers into equal groups.
    9 ÷ 3 = 3 is the same as separating nine objects into three groups of three
  4. Understand how multiplication and division relate to each other.
    4 × 5 = 20 ÷ 4
  5. Use a letter to represent a whole number in multiplication and division problems.
    12 ÷ x = 6

Number and Operations in Base Ten

  1. Use knowledge of place value to add and subtract within 1,000 and to round to the nearest 10.

Number and Operations: Fractions

  1. Understand how fractions with a numerator of 1 — ½, ⅓, ¼ — relate to equal parts of a whole number.
  2. Compare equal fractions (such as ½ and 2/4) using number lines or visual models.
    ¼ + ¼ = 2/4 which equals ½ of the circle, so 2/4 = ½
    fractions

Measurements and Data

  1. Solve problems by measuring object mass and liquid volume.
  2. Use picture and bar graphs to illustrate measurement data.

Geometry

  1. Find the area of shapes.
    Q: Find the area of the rectangle.
    area
    A: 12 ft x 10 ft = 120 ft2
    So the area of the rectangle is 120 ft2.
  2. Relate fractions to shapes as they divide a whole into equal parts.
    Q: Show the fraction 1/6 on a circle.
    A: fractions
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