Students often refer to Maths Mela Class 4 Solutions Chapter 3 Pattern Around Us Question Answer NCERT Solutions to verify their answers.
Class 4 Maths Chapter 3 Pattern Around Us Question Answer Solutions
Pattern Around Us Class 4 Maths Solutions
Class 4 Maths Chapter 3 Solutions
Let Us Count (Page 34)
Gundappa has some land with tall coconut trees.
How many coconut trees does Gundappa have? ______
Answer:
81
How do you know?
Answer:
By counting 9 × 9 = 81
Gundappa has plucked 5 coconuts from each tree.
How many coconuts has he plucked? ______
Answer:
There are 81 trees.
Gundappa has plucked 5 coconuts from each tree
∴ No. of coconuts = 81 × 5
= (80+1) 5
= 80 × 5 + 1 × 5
= 400 + 5
= 405
Muniamma makes plates and cups.
Number of cups = ______
Answer:
60
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.
How many coconut laddoos are there in the trays? ______
Answer:
No. of coconut laddoos in 1 tray
= 4 × 3 = 12
∴ No. of coconut laddoos in 3 trays
= 3 × 12 = 36
How many milk pedas are there in the trays? ______
Answer:
No. of milk pedas in 1 tray = 13
∴ No. of milk pedas in 3 trays = 3 × 13 = 39
Patterns with Money (Page 35)
Shirley and Shiv arranged their play money in some nice patterns as shown below.
How did you count them? Discuss in class.
Answer:
Here No. of ₹ 5 coins = 4
and No. of ₹ 10 coins = 4
and No. of ₹ 20 coin = 1
∴ Total money = 4 × 5+4 × 10 + 1 × 20
= 20 + 40 + 20
= ₹ 80
Here No. of ₹ 2 coins = 4
and No. of ₹ 5 coins = 8
and No. of ₹ 10 notes = 6
Total money
= 2 × 4 + 5 × 8 + 10 × 6
= 8 + 40 + 60
= ₹ 108
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.
Answer:
Two Ways (Pages 35-36)
Shirley and Shiv arranged their coins in the following ways. Write the number of coins in the triangle.
Describe Shiv’s arrangement and write his numbers.
Answer:
Shiv has arranged his numbers in pairs. We call such numbers ‘even’ numbers.
These are 4,6,8,12,14
Describe Shirley’s arrangement and write her numbers.
Answer:
Shirley has arranged his numbers in pairs except 1 . These numbers are called odd numbers.
These are 1,3,5,7,11,17
Numbers between 1 and 20 are
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20
Here numbers 2,4,6,8,10,12,14,16,18,20 are even numbers. and numbers 1,3,5,7,9,11,13,15,17,19 are odd numbers.
Identify numbers between 1 and 20 as even or odd. You may draw the pairing arrangement of the numbers.
Answer:
Do you think all numbers in the times- 2 table are even?
Answer:
Yes all numbers in the times -2 table are even.
Crayons Arrangement (Pages 37-38)
Circle the odd numbers and put a square around each even number. Use the crayons arrangement, if needed.
Answer:
Which numbers are even and which are odd? Discuss.
Answer:
The numbers which are divisible by 2 are called even numbers. Example 2, 4, 6, …
The numbers which are not divisible by 2 are called odd numbers. Example 1, 3, 5, 7, …
Shirley observes àn interesting evenodd 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.
Answer:
Do yourself.
Identify which of the following numbers are even and which are odd. Explain your reasoning.
Odd numbers : ______________________________________________
Even numbers : ______________________________________________
Answer:
Odd numbers 67, 415 and 99 are odd numbers because these numbers are not divisible by 2.
Even numbers 30, 46, 78, 300 and 154 are even numbers because these numbers are divisible by 2.
Make two 2-digit numbers using the digits 1 and 6 without repetition.
Answer:
16 and 61
16 is even number
61 is odd number.
For example two digits are 1 and 4
____ number =14 which is an even number.
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 ?
Answer:
Yes there are more even and odd numbers between 1 and 100.
There are 50 even numbers between 1 and 100: 2,4,6,8, …… 100.
There are 50 odd numbers between 1 and 100: 1,3,5,7, …… 99.
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.
Shirley’s observation is correct. For example in the sequence 2,3,4, the numbers before and after the odd number 3 are even numbers.
Shiv’s question is also correct. For example, in the sequence 3,4,5 the numbers before and after the even number 4 are odd numbers.
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.
Answer:
Let’s choose the numbers from 21 to 30
The pattern alternates between odd and even numbers.
An odd number is always surrounded by even numbers.
An even number is always surrounded by odd numbers.
There are an equal number of even and odd numbers between 1 and 100 , and pattern alternates between odd and even numbers.