Inventory Check Complete! You are a Math Master Manager! Wait! The factory count is off. Let's try that calculation again! Factory Efficiency Level ... Is the answer ... ? ... Or is it ... Excellent Packing! The shipment is ready to go. Not quite! You have Red and Blue. We need 14 Red and 10 Blue.
If you have 40 castle bricks and buy 15 more, what is the "Sum"?
Correct! 40 plus 15 gives us a total sum of 55 bricks.
The "Commutative Property" means 15+20 is the same as...
Spot on! In addition, the order of the numbers doesn't change the final total.
When the "Ones House" gets more than 9 people, what do we do?
Exactly! We bundle 10 ones together and carry them over to the Tens column.
You have 100 toy cars. If you ship 30 to a store, what is the "Difference"?
You got it! 100 minus 30 leaves you with a difference of 70 cars.
Why is subtraction called an "Inverse Operation" to addition?
Perfect! Adding and subtracting are opposites that can check each other's work.
If you try to subtract 8 ones from 2 ones, what must you do first?
Right! We borrow a "ten" and turn it into ten "ones" so we have enough to subtract.
If 5+10=15, what is 15−5?
Correct! They are a fact family. If you take 5 away from 15, you are left with 10.
Which three numbers make a Fact Family?
Yes! 2+3=5 and 5−3=2. They work together perfectly!
To check if 50−20=30 is correct, what can we add?
Exactly! We add the answer (30) back to what we took away (20) to see if we get the start (50).
1
The Toy Factory Manager: Discovering the Big Question
EvoClass-MATH001 Lesson 2
0
+
-
🦉 Hoot hoot! Welcome to the Master Manager’s Office! I'm your AI Tutor, and today you’re in charge of the world’s biggest toy factory.
Manager AI ONLINE
Hoot hoot! Welcome, Manager!
To keep our factory running, we must master the secrets of Addition and Subtraction.
Factory Efficiency 0%
Addition is like the assembly line where we bring toy parts together! When we add the number of bricks and wheels, we find the 'Sum.' Remember the Right-to-Left Rule!
1
Sub-Topic 1
The Assembly Line
Combining parts to build big.
Subtraction happens at the shipping dock! When toys leave the factory, we find the 'Difference' to see what's left. If we don't have enough, we borrow from the neighbor!
2
Sub-Topic 2
The Shipping Dock
Checking inventory as toys leave.
Quality Control is where we check our work! Addition and Subtraction are a family. If 3 plus 5 is 8, then 8 minus 5 must be 3. It helps us catch mistakes!
3
Sub-Topic 3
Quality Control
Checking work with Fact Families.
Here is a factory secret! The plus and minus signs we use today were first used by warehouse merchants over 500 years ago to mark their crates!
Factory Secret
The + and - signs were invented over 500 years ago to help merchants count crates!
Factory Floor
Click to merge parts!
Loading...
⭐⭐⭐

Promotion Earned!

You are a Master Manager!

Crate Packing Mission
Pack a shipment of 24 crates.
We need 14 Red (Robots) and 10 Blue (Cars).
Red: 0
Blue: 0
Total: 0