Addition Input/Output Tables to 20

Imagine you get apple and orange slices in your lunch box every day.Ā

The number ofapplesliceschanges each day. But you get3 orangeslicesevery day.

On Monday, you get5apple slices. On Tuesday,7apple slices. On Wednesday,10apple slices. How many total slices of fruits do you get each day?

How can we solve this problem?

Since we are adding the same number so many times, we can keep track of them in a **table.**Ā

We call these** input/output tables.**

Letās take a look at what an** input/out table** is.

Every input/output table has two columns.Ā

The **input column** has the numbers you start with.Ā

The **output column** has the numbers you get after following the table **rule.**

Every input/output table has a rule! šŖ

The **rule** tells us what we have to do to the numbers in the āInā column to get the āOutā column.

Think about our original problem.Ā

Our ins are going to be: 5, 7, and 10 apple slices.

Now, how do we get the output?Ā

In this case, the output will be the total after you **add 3 orange slices**.

This means the rule for the table is:Ā

ADD 3

Start with:Ā

5 + 3 = 8

Now, weāll put 8 in the first āOutā spot.

Letās do the next one!

7 + 3 = 10

Great! Now, put 10 in the second spot.

Can you fill in the last one?

Great job!! š

The **"out" column** shows the total fruit slices you get each day.

Letās try another one.

Hereās an input/output table:

The rule is:Ā

ADD 10

Letās try the first one together.

3 + 10 = 13

Letās put 13 in the first āOutā spot.

Can you do the rest of them?

You got it!! š¤ Great work!

You now know how to use input/output tables!

Now you can try practice. š

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