Mathematics
Grade 1
15 min
Adding 3
Adding 3
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Add 3 to any number from 0 to 17.
Use a number line to show adding 3.
Solve '+3' word problems by drawing pictures.
Demonstrate the 'counting on' strategy for adding 3.
Write a complete number sentence for an 'adding 3' problem.
Quickly recall addition facts for +3.
You have 6 yummy cookies 🍪. What if a friend gives you 3 more? Let's find out how many you have!
Today, we will learn a super skill: adding the number 3. This trick will help you solve problems much faster. It's like a math superpower! 💪
Real-World Applications
Adding 3 more crayons to your box 🖍️
Seeing 3 more birds join a group on a wire 🐦
Getting 3 more stickers for your collection ✨
Putting 3 more blocks on your tower 🧱
2
Key Concepts & Vocabulary
TermDefinitionExample
AddTo put numbers or groups together. It makes the number bigger.We add 4 cats 🐈 and 3 cats 🐈 to find the total.
SumThe answer you get when you add numbers together. It's the total.In 5 + 3 = 8, the sum is 8.
Plus Sign (+)This little sign tells you to add! It looks like a small cross.When you see 7 + 3, the plus sign means 'add'.
Equals Sign (=)This sign means 'is the same as'. It shows you where the answer goes.8 + 3 = 11. The total is the same as 11.
Counting OnA fast way to add. You start with a number and count up.For 9 + 3, you say '9...' and then count three more: '10, 11, 12!'
3
Core Formulas
The 'Add 3' Rule
n + 3
This means you take any number 'n' and add 3 more to it.
The 'Three Hops' Rule
n → n+1 → n+2 → n+3
On a number line, start at a number and make three hops forward to find the answer.
The 'Turn-Around' Rule
n + 3 = 3 + n
You can switch the numbers around the plus sign. The answer is still the same!
4 more steps in this tutorial
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Challenging
Lily had some pencils. Her teacher gave her 3 more. Now she has 17 pencils. How many pencils did Lily have at the start?
A.20
B.15
C.14
D.13
Challenging
Ben has 9 + 3 marbles. Anna has 10 + 1 marbles. Who has more marbles?
A.Ben
B.Anna
C.They have the same number
D.There is not enough information
Challenging
I am a number. If you add 3 to me, you get a number that is 1 less than 20. What number am I?
A.15
B.16
C.17
D.18
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