Imagine you are at the beach with your family. You can see shells, boats, crabs, and waves all around you. Maths is hiding right there in front of you! When you count shells or arrange them in rows, you are doing maths.
What will we learn?
In this chapter we learn to count objects up to 99, read and write numbers, compare numbers using words like "more" and "fewer", and arrange numbers in order.
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Key Concepts
Counting objects: We count one by one to find "how many." Always count each object only once.
Writing numbers: We can show a number with digits (7) or in words (seven).
More and fewer: If one group has a bigger count, it has MORE objects. If a group has a smaller count, it has FEWER objects.
Ordering numbers: Numbers can be arranged from smallest to biggest (ascending) or from biggest to smallest (descending).
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Worked Examples
Meera picked 6 red shells and 4 white shells. How many shells did she pick in all?
Count all shells together: 6 + 4 = 10 shells.
Raju counted 15 crabs on the left side of the beach and 9 crabs on the right side. Which side has more crabs?
15 is bigger than 9, so the left side has more crabs.
Arrange these numbers from smallest to biggest: 23, 9, 17, 5.
Compare: 5 < 9 < 17 < 23. Order: 5, 9, 17, 23.
There are 20 boats. 8 boats sailed away. How many boats are left?
20 - 8 = 12 boats are left.
Write the number 34 in words.
34 = thirty-four.
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Common mistakes
- Do not count the same object twice. Point to each object as you count.
- When comparing, look at the tens digit first. 32 > 29 because 3 tens > 2 tens.
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Summary
At the beach we practise counting, comparing, and ordering numbers. These skills help us in everyday life — from counting shells to sharing snacks equally!