Array
Here are the tops of the dice. We know we have 2 groups of 5.
We need to make an array that has 2 rows with 5 dots in each row. Click 
to see!
Let’s Learn!
Skip count by 5s.
Goal:
Goal:
Think About It!
Goal: Know when to skip count.
We rolled two 5s.
How many spaces can we move? We will use multiplication to find out. This means we will add together equal groups. Multiplication is like repeated addition. Repeated addition adds the same addend many times. We can also use an array to help us find the answer. An array puts items into rows and columns.
Illustration of three methods for counting. First, multiplication is illustrated by a box with text How many groups? followed by a times symbol followed by a box that reads How many in each group? An arrow points to the next method labeled repeated addition. The repeated addition is represented by 5 empty underlines separated by addition symbols. A blank underlined space is circled and labeled number in each group. A bracket surrounds all blank spaces from below and is labeled number of groups. Finally, the last method is array and it is represented by 8 blue dots in two columns of 4 dots.
We can also use skip counting to help us multiply. Skip counting is counting up by the same number. We will skip count by 5s. It looks like this:
5, 10, 15, 20, 25
Let’s skip count by 5s to multiply!
Repeated Addition
This is a 2 by 5 array.
What repeated addition sentence can we use to solve? Look at the rows to find the number of addends. Look at the dots in each row to find the repeated addend.
Question 1:
How many addends do we need?
There are 2 rows. That means we need 2 addends.
Question 2:
What is the repeated addend?
There are 5 dots in each row. That means 5 is the repeated addend.
Multiplication
This repeated addition sentence can help us find the answer.
What multiplication sentence can we use to solve? Look at the number of rows for the number of groups. Look at the number of dots in each row for the number in each group.
Question 1:
How many groups are there?
There are 2 rows. That means there are 2 groups.
Question 2:
How many are in each group?
There are 5 dots in each row. That means there are 5 in each group.
Skip Counting
Both of the sentences can help us find the spaces we will move.
It is quick and easy to skip count! Let’s skip count by 5s. We know we need to skip count by 5s because we have groups of 5. We can do this by skip counting with each row. The last number in the sequence is the answer! Click to skip count!
We can move 10 spaces!
Skip counting can help us add and multiply!