Mathematics
Grade 3
15 min
Divide by 2
Divide by 2
Tutorial Preview
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Introduction & Learning Objectives
Learning Objectives
Define 'dividing by 2' as splitting a number into two equal groups or finding half.
Solve division equations with a divisor of 2 (e.g., 14 ÷ 2 = 7).
Use multiplication facts for 2 to solve related division problems.
Identify even numbers as numbers that can be divided by 2 with no remainder.
Use drawings or models to represent and solve problems involving division by 2.
Solve one-step word problems that require dividing by 2.
If you have 8 delicious cookies to share equally with one friend, how many cookies does each of you get? 🍪
In this lesson, we will learn all about dividing by 2! This is a super useful skill that means sharing something into two equal parts, or finding 'half' of a number. Learning this helps us solve problems qu...
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Key Concepts & Vocabulary
TermDefinitionExample
DivisionThe action of splitting a number into equal parts or groups. The symbol for division is ÷.10 ÷ 2 = 5 means 10 is split into 2 equal groups of 5.
DividendThe total number of items you are starting with before you divide.In 12 ÷ 2 = 6, the dividend is 12.
DivisorThe number you are dividing by. It tells you how many equal groups to make.In 12 ÷ 2 = 6, the divisor is 2.
QuotientThe answer to a division problem. It tells you how many items are in each group.In 12 ÷ 2 = 6, the quotient is 6.
Even NumberA whole number that can be divided exactly by 2, with nothing left over. Even numbers end in 0, 2, 4, 6, or 8.18 is an even number because 18 ÷ 2 = 9.
HalfOne of two equal parts that make a whole. Finding half of a number is the same as dividing it by 2.Half of 14 is...
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Core Formulas
The 'Finding Half' Rule
x \div 2 = \text{half of } x
Use this rule to remember that dividing any number by 2 is the same as finding half of that number. This can make the problem feel simpler.
The 'Multiplication Check' Rule
\text{If } a \div 2 = b, \text{ then } b \times 2 = a
Use this rule to check your answer. If you multiply your quotient (the answer) by the divisor (2), you should get the dividend (the starting number).
The 'Even Number' Rule
\text{An even number} \div 2 = \text{a whole number}
Remember that only even numbers can be divided by 2 to get a whole number answer. If a number is odd (like 7 or 13), it cannot be split into two equal whole number groups.
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Challenging
Ben bought 4 packs of juice boxes. Each pack had 4 boxes. He divided all the juice boxes equally between his 2 cousins. How many juice boxes did each cousin get?
A.4
B.8
C.16
D.2
Challenging
A farmer collected 19 eggs. He wants to put them into cartons that hold 2 eggs each. How many eggs will be left over after he fills as many cartons as possible?
A.0
B.1
C.9
D.2
Challenging
Dividing a set of 16 buttons into 2 equal groups is the same as finding which fraction of the set?
A.1/2 (one-half)
B.1/3 (one-third)
C.1/4 (one-fourth)
D.2/1 (two-ones)
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