# 3rd Grade Math Worksheets, Study Guides and Vocabulary Sets

The big ideas in **Third Grade Math** include multiplication and division and strategies for multiplication and division within 100, arrays and area, developing understanding of unit fractions and describing and analyzing two-dimensional shapes.

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with Math Worksheet Generator### Algebra

Associative Property of Addition explains that when three or more numbers are added, the sum is the same regardless of the order in which the numbers are grouped and/or added. Read more...iWorksheets: 3Study Guides: 1 The commutative property of addition says that we can add numbers
in any order and get the same sum. Read more...iWorksheets: 3Study Guides: 1 A one operation function is an equation with only one of the
following operations: addition, subtraction, multiplication, or
division. Read more...iWorksheets: 3Study Guides: 1 What Are Open Number Sentences? Open number sentences are equations that give one part of the equation along with the answer. In order to solve an open number
sentence, the inverse operation is used. Read more...iWorksheets: 3Study Guides: 1 A pattern is an order of things repeated over and over. Read more...iWorksheets: 6Study Guides: 1 What Is Probability? Probability is the chance that a particular event will occur. There are four different ways to show the probability: One way is to show the certainty: certain, likely, somewhat likely, not likely, impossible. The other three ways are with numbers. Probability word problems worksheet. Read more...iWorksheets: 9Study Guides: 1 You can skip count by large numbers such as 25, 50 or 100. Skip counting
allows you to count by large numbers following a pattern. Read more...iWorksheets: 3Study Guides: 1 ### Fractions

When comparing fractions, you are finding which fraction is greater and which fractions is less than the other. Similar to comparing numbers, there are symbols to use when comparing fractions. Read more...iWorksheets: 7Study Guides: 1Vocabulary: 1 Fractions that are equivalent to ½ are fractions that have different denominators than ½, but still show half. Fractions that are equivalent to ½ can be simplified to ½. Fractions equivalent to ½ have an even number as their denominator. Read more...iWorksheets: 3Study Guides: 1 Fractions can show a part of a group or part of a set. Read more...iWorksheets: 6Study Guides: 1 ### Geometry

FreeCongruent shapes are shapes that are the exact same shape and size. Congruent shapes can be rotated or reflected. When 2 shapes are congruent, they have the exact same size and shape. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 1 What Is Perimeter? The perimeter is the measurement of the distance around the
outside of a shape or object. To find the perimeter of a shape or object, simply add the outside dimensions together. Read more...iWorksheets: 5Study Guides: 1 We are surrounded by many different kinds of shapes every day. Many shapes are flat. These shapes are two-dimensional plane figures. Read more...iWorksheets: 10Study Guides: 1 You can use solid shapes to help describe real-world objects.
These shapes have surfaces called faces. Read more...iWorksheets: 5Study Guides: 1 Symmetry is an exact matching of two parts along a fold line. Read more...iWorksheets: 4Study Guides: 1 ### Measurement & Data

Amounts of money may be written in several different ways. Cents may be written with the ¢ sign and dollars can be written with the dollar sign ($). When we add money, we add the amounts and place the correct sign on the sum. Read more...iWorksheets: 4Study Guides: 1 FreeWhat Is Money? Money is what we use to make purchases for our needs and wants. Read more...iWorksheets: 13Study Guides: 1 What are the Standard of Units? When measuring objects or distances, there are certain measurements of length, distance, weight, and capacity that should be used. There are customary standard of units and metric standard of units. Read more...iWorksheets: 3Study Guides: 1 What Is Giving Change? Change is the money you receive back when you purchase an item and give the cashier more than the item cost. To figure out the change you will receive from a purchase, simply subtract the total amount of the purchase from the amount you are giving the cashier. Read more...iWorksheets: 4Study Guides: 1 What Are Graphs? A way to show information in the form of shapes or pictures. Graphs show the relationship between two sets of information. There are many different types of graphs. A few of them include bar graphs, line graphs, pictographs, and circle graphs. Read more...iWorksheets: 13Study Guides: 1Vocabulary: 1 Measurement is the use of units to show size, length, weight, or capacity.There are customary measurements and metric measurements. Read more...iWorksheets: 15Study Guides: 1Vocabulary: 2 What Is Temperature? Temperature is the measure of how hot or cold something is. Temperature is measured with a thermometer. Temperature is measured in degrees Celsius (ºC) or degrees Fahrenheit (ºF). Read more...iWorksheets: 4Study Guides: 1 FreeWhat Is Time? Time is a way to measure days, nights, and events. Time is made up of seconds, minutes, and hours. An analog clock is a clock with the numbers 1 through 12 around in a circle. Read more...iWorksheets: 23Study Guides: 1 What are Units of Measurement? People measure mass, volume, and length. These measurements are labeled with appropriate unit of measurement. Read more...iWorksheets: 4Study Guides: 1 ### Number & Operations

FreeAdding large numbers involves breaking the problem down into smaller addition facts. Read more...iWorksheets: 4Study Guides: 1 What Is Three-Digit Subtraction? We subtract to compare numbers. We are able to find the difference between numbers through subtraction. We use subtraction to find out how much more we have or how much smaller something is in comparison to another number. Read more...iWorksheets: 3Study Guides: 1 FreeWhat Is Division? Division is an operation that tells: how many equal sized groups, how many in each group. The number you divide by is called the DIVISOR. The number you are dividing is called the DIVIDEND. And the answer is called the QUOTIENT. Read more...iWorksheets: 7Study Guides: 1 What Is Double Digit Addition? Double digit addition is taking a two digit number (ex. 32) and adding it to another two digit number (ex. 27). The answer of these two addends is known as the sum. Read more...iWorksheets: 4Study Guides: 1 What Is Double Digit Subtraction? Double digit subtraction is taking a number with two digits (ex. 23) and subtracting it from another two digit number (ex. 33). The answer is known as the difference. Read more...iWorksheets: 4Study Guides: 1 When you make an estimate, you are making a guess that is approximate.
This is often done by rounding. Read more...iWorksheets: 6Study Guides: 1 What Are Expanding Numbers? An expanding number is taking a larger number apart and showing each number’s total value. Number 5398 in expanded form is 5000 + 300 + 90 + 8. Read more...iWorksheets: 3Study Guides: 1 What Is Greater Than and Less Than? When a number is greater than another number, this means it is a larger number. The symbol for greater than is >. When a number is less than another number, this means it is a smaller number. The symbol for less than is <. Read more...iWorksheets: 7Study Guides: 1 Multiplication is similar to adding a number to itself a certain number of times.
When multiplying an odd number with an odd number, the product is always an odd number. When multiplying an odd number with an even number or two even numbers, the product is always an even number. Read more...iWorksheets: 22Study Guides: 1 Numbers can be written in word form. Read more...iWorksheets: 3Study Guides: 1 What is odd number? An odd number is a number that will have a leftover when divided into two equal groups. What is even number? An even number is a number that can be divided into two equal groups without any leftovers. Read more...iWorksheets: 6Study Guides: 1 When you order numbers, you are putting the numbers in a sequence from the smallest value to the largest value. When you compare two numbers, you are finding which number is larger or smaller than the other. Read more...iWorksheets: 6Study Guides: 1Vocabulary: 1 Place value is what each digit is worth. In the number 4,573 there are four thousands, five hundreds, seven tens, and three ones. How to Find the Place Value: In order to find the place value of a number, you can count the number of places from the right. The first number will be the ones place. The next number moving towards the left would be the tens place, and so on. Read more...iWorksheets: 10Study Guides: 1 What Is Regrouping? Regrouping in addition is used when the sum of the ones place is larger than nine. The tens place of the sum is moved to the top of the tens place column to be added with the others. Read more...iWorksheets: 3Study Guides: 1 Rounding makes numbers easier to work with if you do not need an exact number. Rounded numbers are only approximate. You can use rounded numbers to get an answer that is close but does not have to be exact. Read more...iWorksheets: 3Study Guides: 1 What Are Story Problems? Story problems are a bunch of sentences set up to give you
information in order to solve a problem. Story problems most often give you all the information needed to solve the problem. They may even include information you do not need at all. Read more...iWorksheets: 18Study Guides: 1 Standards

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