Solving Simple Subtraction Word Problems (within 10)

Free sample questions, a clear explanation, and 5 practice skills with an AI tutor that guides without giving the answer away.

The Great Cookie Mystery!

Hi, Math Detective! Have you ever noticed something was missing and tried to figure out what happened? It's like being a super sleuth! Solving subtraction stories is just like solving a fun mystery. We start with a big group (that's our whole), then some of it goes away, and we have to find out what's left, or how much went away!

Solving the Case of the Missing Cookies

Here's our big mystery: There were 10 cookies on a plate. You ate some, and now there are 6 left. How many cookies did you eat? Let's use our detective skills to solve it!

Step 1: Use Your Detective Tools (Concrete)

First, let's act out the story. Grab 10 small things, like LEGO bricks, crayons, or yummy crackers. These are your 10 cookies (the whole group).

Line up all 10 of your "cookies."
We know there are 6 left at the end. So, separate 6 "cookies" into a "leftovers" pile.
Now, count the other pile. How many are in that group? That's how many you ate!

Step 2: Draw the Clues (Pictorial)

Great job! Now, let's draw what happened. We can use a Number Bond! The big circle is for the whole (10 cookies). The two smaller circles are for the parts. We know one part is 6 (the cookies left). We need to find the other missing part!

10 (whole) = 6 (part) + ? (missing part)

You can draw 10 circles, then cross out 6. How many are not crossed out?

Key Takeaway!

When you know the whole group and one part, you can subtract to find the other missing part!

Step 3: Write the Secret Code (Abstract)

You've cracked it! The last step is to write our clues as a number sentence. We started with 10 cookies and ended with 6. To find the part we ate, we subtract.

10 - 6 = 4

Mystery solved! You ate 4 cookies. Amazing work, Super Sleuth!

Sample questions

1. There were 7 birds on a branch. 3 birds flew away. Now there are 4 birds left. How many birds were on the branch at the beginning?

○ 3

✓ 7

○ 4

○ 10

Answer: 7 — The question asks for the total number of birds *before* any flew away.

2. Mia had 8 cookies. She ate some, and now she has 2 cookies left. How many cookies did Mia eat?

○ 8

○ 2

✓ 6

○ 10

Answer: 6 — Think about how many cookies are *missing* from the start.

3. There were 5 balloons. Some popped, and now there are 2 balloons left. How many balloons popped?

✓ 3

○ 5

○ 2

○ 7

Answer: 3 — Count how many balloons are *gone* from the original group.

Skills in this topic

Identify the 'whole' and the 'part taken away' or 'part remaining' in a simple subtraction word problem.
Model subtraction word problems using concrete objects.
Draw pictorial representations (e.g., bar models, number bonds) for subtraction word problems.
Write and solve subtraction equations for word problems within 10.
There were 10 cookies on a plate. You ate some, and now there are 6 left. Explain how you can find out how many cookies you ate.

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