Mathematics
Kindergarten
15 min
Count on twenty frames (up to 20)
Count on twenty frames (up to 20)
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify the starting number on a twenty frame.
Use the 'count on' strategy to add up to 5 more.
Place new counters on a twenty frame to show addition.
Find the total sum up to 20.
Say an addition sentence that matches the twenty frame.
Explain that adding means getting more.
Look at all these happy stars! β If we have 10 stars and get 3 more, how many will we have?
We will learn a fun trick called 'counting on'. We will use a special chart called a twenty frame. It helps us add numbers super fast! π
Real-World Applications
Counting your toys when you get new ones π§Έ
Sharing snacks with a friend π
Counting how many friends are playing π€Έ
Putting away your crayons ποΈ
2
Key Concepts & Vocabulary
TermDefinitionExample
Twenty FrameA big rectangle with 20 small boxes inside. We use it to count things. πΌοΈIt looks like two ten frames put together. It has two rows of ten boxes.
Count OnA fast way to add! You start with the bigger number and count up. π£οΈFor 7 + 2, you say '7...' then count '8, 9'. The answer is 9!
Add (+)To put two groups of things together to see how many in all. β3 butterflies join 2 butterflies. We add them! π¦π¦ + π¦π¦π¦
TotalThe number you get after you add everything together. It's how many in all. =If you have 5 red blocks and 2 blue blocks, the total is 7 blocks.
CounterA small object like a dot or a chip that we put in the twenty frame boxes. π΅We can use red dots and yellow dots to show adding two numbers.
3
Core Formulas
The 'Count On' Rule
Starting Number + More Counters = Total
Use this to add numbers. First, see the number you start with. Then, add more counters and count up from the starting number.
The 'Say It Loud' Rule
Say the big number... then count on!
When you add, put the big number in your head and say it out loud. Then use your fingers or the new counters to count the rest.
4 more steps in this tutorial
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Challenging
A twenty frame starts with 15 dots. Sam adds some more dots. Now there are 19 dots. How many dots did Sam add?
A.3
B.5
C.4
D.2
Challenging
You start with 8 dots. You add some more to get a total of 12. How many dots did you add?
A.3
B.4
C.5
D.2
Challenging
A frame has 14 dots. You add 5 more. How many more dots do you need to make 20?
A.1
B.2
C.19
D.0
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