MathIsimple
Unit 2: Lesson 1

Addition & Subtraction Concepts

Plant the seeds of math knowledge! Discover what addition and subtraction really mean with fun garden adventures. Watch your understanding grow!

35-45 min
Easy
Addition Meaning
Subtraction Meaning
Plus & Minus Signs
Operation Concepts

๐ŸŒฑ Grow Your Math Garden!

Plant, water, and harvest math knowledge with these interactive activities!

Drag Apples to Add

Combine groups to find the total!

Easy
5 minutes
๐ŸŽ

Drag ๐ŸŽ groups together and count the total

๐Ÿ–ฑ๏ธ Drag options below to the correct boxes (computer) or click to move (mobile)

๐Ÿ“ Target Zones

๐ŸงบHow many apples in total?
Waiting...
๐Ÿงบ(Drag the second group)
Waiting...

๐ŸŽฏ Draggable Options

๐ŸŽ5 ๐ŸŽ
๐ŸŽ3 ๐ŸŽ
Progress:
0 / 2
Click to interact โ†’

Addition or Subtraction?

Choose the right operation!

Easy
4 minutes
๐Ÿฌ

Xiao Ming has 7 candies, and mom gave him 5 more. Which operation should we use?

Click to interact โ†’

Write the Equation

Look at the picture and write the equation!

Medium
5 minutes
๐Ÿฐ

There are 12 flowers ๐ŸŒธ in the garden, a bunny ate 4. Write the equation: 12 ___ 4

Click to interact โ†’

Master These 8 Key Concepts

Build a strong foundation in addition and subtraction - the heart of all math!

1

What is Addition?

Addition means PUTTING TOGETHER or COMBINING two or more groups to find the total! When you add, the answer gets BIGGER. We use the + symbol (plus sign) to show addition. Think of it as growing your garden by planting more flowers!

๐Ÿ’ก Imagine planting 3 red flowers and 5 yellow flowers - addition tells you the total flowers in your garden!

๐ŸŒŸExamples:

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Toy Collection

You have 4 toy cars. Friend gives you 3 more cars. Add them: 4 + 3 = 7 toy cars total!

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Cookie Jar

Mom bakes 6 cookies. Dad bakes 5 cookies. How many total? 6 + 5 = 11 cookies!

๐ŸŒน

Garden Flowers

Plant 7 roses + 4 tulips = 11 flowers in your garden! Addition combines them!

๐Ÿ“š

Books on Shelf

5 books on top shelf + 8 books on bottom shelf = 13 books total!

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Birthday Balloons

9 red balloons + 6 blue balloons = 15 balloons for the party!

Common Mistake Alert! โš ๏ธ

Thinking addition makes numbers smaller! Remember: Addition ALWAYS makes the total bigger (or stays same if adding 0)!

2

What is Subtraction?

Subtraction means TAKING AWAY or REMOVING part of a group! When you subtract, the answer gets SMALLER. We use the - symbol (minus sign) to show subtraction. Think of it like picking flowers from your garden!

๐Ÿ’ก Imagine having 10 apples and eating 4 - subtraction tells you how many are left!

๐ŸŒŸExamples:

๐Ÿ˜

Eating Snacks

You have 12 crackers. You eat 5 crackers. How many left? 12 - 5 = 7 crackers remain!

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Giving Away Toys

You have 15 stickers. Give 7 to your friend. How many left? 15 - 7 = 8 stickers!

๐Ÿ…

Garden Harvest

10 tomatoes growing. Pick 6 for dinner. How many left growing? 10 - 6 = 4 tomatoes!

๐Ÿฆ

Birds Flying Away

14 birds on a tree. 9 fly away. How many stay? 14 - 9 = 5 birds left!

๐Ÿ–๏ธ

Used Crayons

Box has 18 crayons. 8 are broken. How many good ones? 18 - 8 = 10 good crayons!

Common Mistake Alert! โš ๏ธ

Mixing up which number goes first! In 10 - 3, you START with 10 and take away 3. The bigger number usually comes first!

3

Understanding the Plus Sign (+)

The + sign tells us to ADD or COMBINE! When you see +, think 'put together.' It's like a signal that says: 'Make this group bigger by adding more!' Always read left to right: first number + second number.

๐Ÿ’ก The + looks like a cross - it connects two groups into ONE bigger group!

๐ŸŒŸExamples:

โž•

Reading It Right

8 + 5 reads as 'eight plus five' or 'eight add five' = 13

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In a Sentence

'Emma has 7 apples. Gets 4 more.' Write it: 7 + 4 = 11 apples!

๐Ÿ”ข

Multiple Adds

Can add more than two! 3 + 4 + 2 = 9. Add first two, then add the third!

๐Ÿช

Real World

Store sign: 'Buy 2, get 1 free!' That's 2 + 1 = 3 items total!

Common Mistake Alert! โš ๏ธ

Confusing + with other symbols. Plus (+) means ADD, not subtract or multiply!

4

Understanding the Minus Sign (-)

The - sign tells us to SUBTRACT or TAKE AWAY! When you see -, think 'remove from the group.' It signals: 'Make this group smaller!' Order matters a LOT in subtraction - always start with the first number!

๐Ÿ’ก The - looks like removing a line - it shows something is being taken away!

๐ŸŒŸExamples:

โž–

Reading It Right

13 - 5 reads as 'thirteen minus five' or 'thirteen subtract five' = 8

โšซ

In a Sentence

'Jake had 16 marbles. Lost 7.' Write it: 16 - 7 = 9 marbles left!

โš ๏ธ

Order Matters!

5 - 3 = 2, but 3 - 5 is different! Can't take away more than you have (in 1st grade)!

0๏ธโƒฃ

Zero Result

10 - 10 = 0. If you take away everything, nothing remains!

Common Mistake Alert! โš ๏ธ

Switching the numbers! 14 - 6 is NOT the same as 6 - 14. The first number is what you START with!

5

Understanding the Equals Sign (=)

The = sign means 'is the same as' or 'equals.' It shows the answer! Both sides of = must have the same value. It's like a balance - both sides must weigh the same!

๐Ÿ’ก The = sign has two parallel lines showing perfect balance - like a perfectly level see-saw!

๐ŸŒŸExamples:

โš–๏ธ

In Addition

7 + 3 = 10. The left side (7+3) equals the right side (10). Same value!

๐Ÿ”ข

In Subtraction

15 - 6 = 9. The answer 9 is what 15-6 equals. They're the same!

โ†”๏ธ

Both Sides Same

5 + 5 = 10 and 10 = 5 + 5 mean the exact same thing! Order doesn't matter with =

โœ…

Without Operations

12 = 12. The simplest equation - both sides are identical!

Common Mistake Alert! โš ๏ธ

Using = to mean 'and then' in a story. Example: '3+2=5+1=6' is confusing! Each equation needs its own =

6

Addition Makes Things Grow!

Addition is about GROWTH and INCREASE! Whether you're gaining points in a game, getting more toys, or seeing flowers bloom - addition shows things getting bigger. The sum (answer) is always equal to or GREATER than the numbers you started with!

๐Ÿ’ก Think of addition like a garden growing - you plant seeds (numbers) and watch the total grow bigger!

๐ŸŒŸExamples:

๐Ÿ“‡

Growing Collection

Start with 8 Pokemon cards. Trade for 7 more. Collection grows: 8 + 7 = 15 cards!

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Points in Game

Round 1: 12 points. Round 2: 8 more points. Total score grows: 12 + 8 = 20 points!

๐Ÿ…

Garden Growing

Week 1: 5 tomatoes. Week 2: 6 more tomatoes. Garden grows: 5 + 6 = 11 tomatoes!

๐Ÿ’ฐ

Saving Money

Saved $9 in January + $11 in February. Savings grow: 9 + 11 = $20!

Common Mistake Alert! โš ๏ธ

Not seeing the 'bigger picture' of addition. Help kids understand that addition = more/bigger/growing!

7

Subtraction Shows What's Left!

Subtraction is about what REMAINS after taking away! Whether you're eating cookies, giving away toys, or using supplies - subtraction tells you what's LEFT. The difference (answer) is always LESS than what you started with!

๐Ÿ’ก Think of subtraction like picking flowers from a garden - you see what remains after some are picked!

๐ŸŒŸExamples:

๐Ÿช

Cookies Eaten

Plate had 13 cookies. Ate 5 cookies. What's left? 13 - 5 = 8 cookies remain!

๐Ÿ–๏ธ

Crayons Used

Box had 18 crayons. Used 9 for art. What's left? 18 - 9 = 9 crayons unused!

๐ŸŒธ

Flowers Picked

Garden had 14 flowers. Picked 6 for vase. What's left? 14 - 6 = 8 flowers growing!

๐Ÿ“–

Pages Left to Read

Book has 20 pages. Read 12 pages. How many left? 20 - 12 = 8 pages to go!

Common Mistake Alert! โš ๏ธ

Forgetting that subtraction shows 'what's left.' The answer is what REMAINS, not what was taken away!

8

Addition & Subtraction Are Opposites!

Addition and subtraction are OPPOSITE operations! Addition puts together (grows), subtraction takes apart (shrinks). They UNDO each other! If you add 5 then subtract 5, you're back where you started. They're like planting flowers and picking flowers - opposite actions!

๐Ÿ’ก Think of them as opposite forces - one builds up, one breaks down. Together they balance!

๐ŸŒŸExamples:

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Undoing Each Other

Start with 7. Add 4 = 11. Subtract 4 = 7. Back to start! 7+4-4=7

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Checking Your Work

If 8 + 5 = 13, then 13 - 5 = 8! Use subtraction to check addition!

๐ŸŒบ

Garden Growing & Picking

Plant 9 flowers (add). Pick 4 flowers (subtract). 9+4-4=9. Opposites!

๐Ÿ’ต

Money In & Out

Earn $12 (add). Spend $12 (subtract). Back to $0! +12-12=0

โš–๏ธ

Real Life Balance

Getting toys (add) vs giving away toys (subtract). Opposite actions!

Common Mistake Alert! โš ๏ธ

Not understanding they're opposites. Teach that addition and subtraction are like forward/backward on a number line!

Ready to Practice?

Test your understanding of addition and subtraction concepts!

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