Transcript What is multiplication?

What is
multiplication?
How can I solve
multiplication problems
without a calculator?
What is multiplication?
 Multiplication is a math operation where
a number is added to itself a given
number of times.
For example:
When given the problem 3 x 4, the number
3 is added to itself 4 times.
3 + 3 + 3 + 3 = 12
What do multiplication
problems look like?
There are two ways you will see multiplication
problems.
3
x4
3•4
Multiplication problems are written with an “x” or
with a dot. If you see either one of these symbols,
you know you should multiply.
Multiplication Vocabulary
Here are some other terms associated with
multiplication.
3
x 4
12
Product – the answer
to a multiplication
problem is called a
product.
How do I solve multiplication
problems without a calculator?
There are two different ways to solve
multiplication problems without a
calculator:
 Repeated Addition
 Making Groups (also known as
drawing a picture)
Repeated Addition
Repeated addition occurs when you
add a number to itself a given
number of times.
For example:
4x5
4 + 4 + 4 + 4 + 4 = 20
Making Groups
Another way to solve multiplication
problems, is to make groups or draw a
picture.
For example:
3x3
O O
O
O O
O
O O
O
3x3=9
Examples
Solve the problem below using repeated
addition:
5x6
Solve the following problem by making
groups:
6x3
Your Turn to Practice
1. 8 • 4 =
2. 9 x 5 =
3. 3 x 3 =
4. 6 x 5 =
5. 4 x 9 =