Mathematics
Grade 3
15 min
Divide by 3
Divide by 3
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Relate division by 3 to multiplication by 3 using fact families.
Model division by 3 problems by drawing equal groups or arrays.
Fluently recall division facts where 3 is the divisor.
Solve one-step word problems that require dividing by 3.
Identify the dividend, divisor, and quotient in a division equation.
Use repeated subtraction on a number line to solve a division problem with 3.
If you have 12 yummy cookies to share equally with 2 friends, how many cookies does each person get? 🍪
In this lesson, we will learn all about dividing by 3! This means we will practice sharing a total amount into 3 equal groups or seeing how many groups of 3 we can make. Knowing how to divide by 3 is a super useful skill for sharing fairly and solving problems.
Real-Worl...
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Key Concepts & Vocabulary
TermDefinitionExample
DivisionThe action of splitting a number into equal parts or groups. It's like 'fair sharing'.15 ÷ 3 = 5 means 15 is split into 3 equal groups of 5.
DividendThe total number that you are dividing. It's the biggest number in the problem.In 18 ÷ 3 = 6, the dividend is 18.
DivisorThe number you are dividing by. In this lesson, the divisor will always be 3.In 18 ÷ 3 = 6, the divisor is 3.
QuotientThe answer to a division problem. It tells you how many are in each group or how many groups you can make.In 18 ÷ 3 = 6, the quotient is 6.
Fact FamilyA set of four related multiplication and division facts that use the same three numbers.The fact family for 3, 7, and 21 is: 3 × 7 = 21, 7 × 3 = 21, 21 ÷ 3 = 7, and 21 ÷ 7 = 3.
Equal GroupsGroups that all have...
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Core Formulas
Division Equation
\text{Dividend} \div \text{Divisor} = \text{Quotient}
This is how we write a division problem. The total amount comes first, then the division symbol, then the number we are dividing by, and the answer is the quotient.
The Multiplication Check
\text{Quotient} \times \text{Divisor} = \text{Dividend}
You can always check your division answer by using multiplication. If the answer is correct, multiplying it by the number you divided by (3) will give you the number you started with.
4 more steps in this tutorial
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Sign Up Free to ContinueSample Practice Questions
Challenging
A number is divided by 3. The answer is 7 and there is a remainder of 2. What is the number?
A.21
B.13
C.20
D.23
Challenging
There are 2 dozen donuts. (A dozen is 12). If the donuts are shared equally among 3 classrooms, how many donuts does each classroom get?
A.8
B.6
C.12
D.24
Challenging
Your friend says that any number whose digits add up to a number that can be divided by 3, can also be divided by 3. For example, for the number 12, 1+2=3, and 3 is divisible by 3, so 12 is divisible by 3. Which of these numbers follows that rule?
A.43
B.52
C.63
D.71
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