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Chapter 3

Patterns Around Us

0433CH03






Let Us Count

Gundappa has some land with tall coconut trees.

How many coconut trees does Gundappa have? ______

How do you know?

Gundappa has plucked 5 coconuts from each tree.

How many coconuts has he plucked?_____

tree

Muniamma makes plates and cups.
Number of cups = ______

cups
Muniamma has arranged coconut laddoos and milk peda in trays like this. All trays have the same arrangement. Trays are placed one on top of the other.

laddoos

How many coconut laddoos are there in the trays? _______

How many milk pedas are there in the trays? ______

coconut laddoos

Note for Teachers: Encourage learners to count using different ways of grouping and share their thinking.

Patterns with Money

Shirley and Shiv arranged their play money in some nice patterns as shown below. arrange notes coins
How much money? ________

notes-coins
How much money? _______

How did you count them? Discuss in class.

Arrange play money of amounts 1, 2, 5, and 10 to show `36, `125, and `183. Ask your peers to tell how much it is.

TWO WAYS


Shirley and Shiv arranged their coins in the following ways. Write the number of coins in the triangles.

Shirley Shiv
Shirley shiv

Describe Shiv’s arrangement and write his numbers.
______________________

Describe Shirley’s arrangement and write her numbers.
______________________

Shiv has arranged his numbers in pairs. We call such numbers ‘even numbers’.

Shirley’s numbers are called ‘odd numbers’.

Identify numbers between 1 and 20 as even or odd. You may draw the pairing arrangement of the numbers.

odd even

Do you think all numbers in the times-2 table are even?

Note for Teachers: Encourage students to identify the pattern-number of objects that can be paired (even) and those that cannot be paired (odd).

Crayons Arrangement


Circle the odd numbers and put a square around each even number. Use the crayons arrangement, if needed. crayons
5
odd		 8
even		 36 69 22 51
30 38 37 52 43

Which numbers are even and which are odd? Discuss. crayons Shirley observes an interesting even-odd pattern in the page numbers of her Maths book.

Explore your textbook and find out what Shirley has seen. Draw a square on the even numbers. Put a circle on the odd numbers.

Identify which of the following numbers are even and which are odd. Explain your reasoning.

30 46 78 67 300 154 415 99

Odd numbers : _____________

Even numbers : _____________

Make two 2-digit numbers using the digits 1 and 6 without repetition. _______________

Identify the numbers as even or odd. Now choose any two digits and make 2-digit numbers in such a way that the numbers are even. ______________

Are there more even or odd numbers between 1 and 100?
crayons
Shirley notices that both the numbers, before and after an odd number, are even.

Shiv wonders if both the numbers, before and after an even number, will be odd. What do you think? Check and discuss.

Choose any 10 numbers in order without skipping any (consecutive numbers). Write whether they are even or odd below each number. What do you notice? Discuss.

20 21 _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _