Class 1 Exam  >  Class 1 Notes  >  Mathematics for Class 1: NCERT (Joyful-Mathematics)  >  Chapter Notes: Making 10 (Numbers 10 to 20)

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Bundle of Ten


A bundle of ten is a group of ten things that are all together in one place.
Example: You have a bunch of pencils scattered around your desk, but you need to keep them all together so you don't lose them. What do you do? You gather them up and tie them together with a rubber band, creating a bundle of ten.Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Make a Group of 10


Look at all those delicious ice creams! But did you know that we can make them even more fun by counting them and grouping them into bundles of 10?
Now, let's take these 10 ice creams and make a bundle.

  • Group of 1 ten is 10.
  • Making 10 (Numbers 10 to 20) Class 1 Notes MathsGroup of 2 ten is 20.

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

  • Group of 2 ten is 20.
    Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Counting from 10 to 20

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Make a group of 10 and write numbers


Do you see all those colorful and yummy toffees?

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

There are so many toffees. Let's make a group of 10 and write 1 in tens place. Now, how many toffees are left? We write down 4 in the ones place. And what does this mean? It means that we have a total of 14 toffees!

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

More or Less


When we say "more", we mean that there is a bigger amount of something. For example, if you have 5 apples and your friend has 7 apples, then your friend has more apples than you.

On the other hand, when we say "less", we mean that there is a smaller amount of something. For example, if you have 10 pencils and your friend has 6 pencils, then your friend has less pencils than you.
Example: Count the number of balloons and tick the group with more objects.

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

The number of balloons in the first box is 16 and in the other box is 8. So the left group has more balloons.

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Addition


Example: Let's say we want to add 6 + 7.
To make it easier, we can imagine that we have two groups of sticks. We have 6 sticks in one group and 7 sticks in another group.

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Now, we can bundle the sticks into a group of 10. We take 6 sticks and add 4 more to make a bundle of 10. We write down the number 1 in the tens place (the column on the left) to show that we have one bundle of 10. Then, we write down the number of sticks we have left in ones place (the column on the right). In this case, we have 3 sticks left over.

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Subtraction

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

Making 10 (Numbers 10 to 20) Class 1 Notes Maths

The document Making 10 (Numbers 10 to 20) Class 1 Notes Maths is a part of the Class 1 Course Mathematics for Class 1: NCERT (Joyful-Mathematics).
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