Addition and Subtraction
Standard 1 Mathematics: Addition and Subtraction
Putting together, taking away, and using +, − and = with numbers up to 20.
➕➖🍎
Welcome to Add and Take Away!
Today we will add by putting together and subtract by taking away.
Find totals by counting on up to 20.
Use + and = for addition.
Add numbers horizontally up to 20.
Use - and = for subtraction.
Subtract numbers horizontally from 1 to 20.
🌟 Complete the missions and become an Addition and Subtraction Star!
➕
Learn: Addition Means Putting Together
When we put groups together, we add.
Group 1
🍎 🍎 🍎
+
Group 2
🍎 🍎
=
Total
?
3 + 2 = ?
🍎
Mission 1: Put Apples Together
There are 3 apples and 2 more apples. How many apples altogether?
🍎 🍎 🍎 + 🍎 🍎 = ?
4
5
6
🔢
Counting On to Find the Total
To add 6 + 3, start at 6 and count on: 7, 8, 9.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
6 + 3 = 9
🦘
Mission 2: Count On
Start at 8. Count on 4 more. Where do you land?
8 + 4 = ?
10
12
14
＋＝
Using + and =
The plus sign means add. The equal sign means the same as.
+
plus means add
=
equals means the same as
4 + 3 = 7
✍️
Mission 3: Choose the Missing Symbol
Which symbol is missing?
5 ___ 2 = 7
+
-
=
🔵
Semi-Concrete Addition
We can use dots to show numbers.
+
4 + 3 = ?
6
7
8
➖
Learn: Subtraction Means Taking Away
When we take away, we subtract.
Start with
🍌 🍌 🍌 🍌 🍌 🍌
−
Take away
🍌 🍌
=
Left
?
6 − 2 = ?
🍌
Mission 4: Take Away Bananas
There are 6 bananas. 2 are taken away. How many are left?
🍌 🍌 🍌 🍌 🍌 🍌
6 − 2 = ?
3
4
5
−＝
Using − and =
The minus sign means subtract or take away.
−
minus means take away
=
equals means the same as
9 − 4 = 5
🎯
Mission 5: Choose the Missing Symbol
Which symbol is missing?
10 ___ 3 = 7
+
−
=
🔵
Semi-Concrete Subtraction
Dots can also help us subtract.
8 − 3 = ?
4
5
6
↔️
Horizontal Addition
Horizontal means the number sentence goes across.
7 + 5 = 12
9 + 4 = 13
10 + 6 = 16
✏️
Mission 6: Add Horizontally
Solve the number sentence.
8 + 7 = ?
↔️
Horizontal Subtraction
We can also subtract across the line.
12 − 5 = 7
18 − 6 = 12
20 − 9 = 11
✏️
Mission 7: Subtract Horizontally
Solve the number sentence.
15 − 6 = ?
🧠
Fun Quiz
1. Addition means:
2. 4 + 5 =
3. Subtraction means:
4. 10 − 4 =
5. Which symbol means add?
🎉🌟
Great Job!
You added by putting together.
You found totals by counting on.
You used + and =.
You subtracted by taking away.
You used − and =.
You solved horizontal addition and subtraction.
🌟 You are an Addition and Subtraction Star!
Standard 1 Mathematics: Addition and Subtraction
Putting together, taking away, and using +, − and = with numbers up to 20.
➕➖🍎
Welcome to Add and Take Away!
Today we will add by putting together and subtract by taking away.
Find totals by counting on up to 20.
Use + and = for addition.
Add numbers horizontally up to 20.
Use - and = for subtraction.
Subtract numbers horizontally from 1 to 20.
🌟 Complete the missions and become an Addition and Subtraction Star!
➕
Learn: Addition Means Putting Together
When we put groups together, we add.
Group 1
🍎 🍎 🍎
+
Group 2
🍎 🍎
=
Total
?
3 + 2 = ?
🍎
Mission 1: Put Apples Together
There are 3 apples and 2 more apples. How many apples altogether?
🍎 🍎 🍎 + 🍎 🍎 = ?
4
5
6
🔢
Counting On to Find the Total
To add 6 + 3, start at 6 and count on: 7, 8, 9.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
6 + 3 = 9
🦘
Mission 2: Count On
Start at 8. Count on 4 more. Where do you land?
8 + 4 = ?
10
12
14
＋＝
Using + and =
The plus sign means add. The equal sign means the same as.
+
plus means add
=
equals means the same as
4 + 3 = 7
✍️
Mission 3: Choose the Missing Symbol
Which symbol is missing?
5 ___ 2 = 7
+
-
=
🔵
Semi-Concrete Addition
We can use dots to show numbers.
+
4 + 3 = ?
6
7
8
➖
Learn: Subtraction Means Taking Away
When we take away, we subtract.
Start with
🍌 🍌 🍌 🍌 🍌 🍌
−
Take away
🍌 🍌
=
Left
?
6 − 2 = ?
🍌
Mission 4: Take Away Bananas
There are 6 bananas. 2 are taken away. How many are left?
🍌 🍌 🍌 🍌 🍌 🍌
6 − 2 = ?
3
4
5
−＝
Using − and =
The minus sign means subtract or take away.
−
minus means take away
=
equals means the same as
9 − 4 = 5
🎯
Mission 5: Choose the Missing Symbol
Which symbol is missing?
10 ___ 3 = 7
+
−
=
🔵
Semi-Concrete Subtraction
Dots can also help us subtract.
8 − 3 = ?
4
5
6
↔️
Horizontal Addition
Horizontal means the number sentence goes across.
7 + 5 = 12
9 + 4 = 13
10 + 6 = 16
✏️
Mission 6: Add Horizontally
Solve the number sentence.
8 + 7 = ?
↔️
Horizontal Subtraction
We can also subtract across the line.
12 − 5 = 7
18 − 6 = 12
20 − 9 = 11
✏️
Mission 7: Subtract Horizontally
Solve the number sentence.
15 − 6 = ?
🧠
Fun Quiz
1. Addition means:
2. 4 + 5 =
3. Subtraction means:
4. 10 − 4 =
5. Which symbol means add?
🎉🌟
Great Job!
You added by putting together.
You found totals by counting on.
You used + and =.
You subtracted by taking away.
You used − and =.
You solved horizontal addition and subtraction.
🌟 You are an Addition and Subtraction Star!
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