Practicing with Maths Mela Class 4 Solutions Chapter 10 Elephants, Tigers, and Leopards Question Answer NCERT Solutions improves a student’s confidence in the subject.
Class 4 Maths Chapter 10 Elephants, Tigers, and Leopards Question Answer Solutions
Elephants, Tigers, and Leopards Class 4 Maths Solutions
Class 4 Maths Chapter 10 Solutions
NIM Game (2 Player Game) (NCERT Pg 149-150)
Question 1.
How to play?
- Player 1 starts by choosing either 1 or 2.
- Player 2 can also choose either 1 or 2 and add it to the number chosen by Player 1.
- The two players continue playing by choosing either 1 or 2 and adding it to the previous total.
- The player who reaches 10 first is the winner.
- Play it for a few rounds.
Can you win the game if
(i) the other player has reached the total of 6 and it is your turn?
(ii) the other player has reached the total of 7 and it is your turn?
(iii) the other player has reached the total of 8 and it is your turn?
Answer:
(i) Do yourself
(ii) Do yourself
(iii) Do yourself
Question 2.
Can you find a number in each case when you are sure that you can win?
Answer:
Do yourself.
Addition Chart (NCERT Pg 150-151)
Question 3.
Look at the table given below and discuss how the table is made.
(i) Identify some patterns in the table.
(ii) Observe the cells where the number 9 appears in the table. How many times do you see number 9 ? What about other numbers?
(iii) Are there any rows or columns that contain only even numbers or only odd numbers? Explain your observation.
(iv) Look at the window frame highlighted in red colour in the table.
(a) Find the sum of the two numbers in each row.
(b) Find the sum of the two numbers in each column. What do you notice?
(c) Find the sum of the numbers in each of the two diagonals marked by arrows. What do you notice?
(d) Put the red window frame in other places and find the sums as above. What do you notice?
(v) Identify some patterns and relationships among the numbers in the blue window frame.
Answer:
(i) In rows and columns, add 1 number to each previous number.
(ii) 12 times, each number appears that many times in the table by adding 3 digits to that number.
(iii) No, every row or column contains even and odd both numbers.
(iv) (a) In 5th row, 10+11=21
In 6th row, 11+12=23
(b) In 5th column, 10+11=21
In 6th column, 11+12=23
The sum of the two numbers in each column increases by 2 numbers.
(c) Sum of first diagonal numbers
=10+12=22
Sum of second diagonal numbers
=11+11=22
The sum of the two numbers in each diagonal is the same.
(d) Do yourself
(v) To obtain the next number, adding 1 number to each number in every row and column.
Reverse and Add (NCERT Pg 151)
Question 4.
(i) Take a 2-digit number say, 27. Reverse its digits (72). Add them (99). Repeat for different 2 -digit numbers.
(ii) What sums can we get when we add a 2 -digit number with its reverse?
(iii) List down all numbers which when added to their reverse give
(a) 55
(b) 88
(iv) Can we get a 3-digit sum? What is the smallest 3 -digit sum that we can get?
Answer:
(i) Do yourself
(ii) Do yourself
(iii) (a) To get a sum of 55, we need to add 14 to its reverse i.e. 14+41=55 and 23 to its reverse i.e. 23+32=55
∴ 14 and 23 will give 55 when added to their reverse.
(b) To get a sum of 88, we need to add 44 to its reverse which is 44 itself
i.e. 44+44=88,
17 to its reverse i.e. 17+71=88
26 to its reverse i.e. 26+62=88
35 to its reverse i.e. 35+53=88.
∴ 17,26,35 and 44 will give 88 when added to their reverse.
(iv) Yes, we can get a 3-digit sum.
e.g. 19+91=110,55+55=110, 66+66=132 etc.
The smallest 3 -digit sum that we can get is 110
Fill in the blanks with appropriate numbers.
Question 5.
Answer:
Question 6.
Maharashtra has 444 tigers. Madhya Pradesh has 341 more tigers than Maharashtra.Uttarakhand has 116 tigers more than Maharashtra.
(i) How many tigers does Madhya Pradesh have?
(ii) How many tigers does Uttarakhand have?
(iii) How many tigers does Madhya Pradesh and Uttarakhand have?
(iv) How many tigers are there in total across the three states?
Answer:
So, Madhya Pradesh has 785 tigers.
So, Uttarakhand has 560 tigers.
So, Madhya Pradesh and Uttarakhand have 1345 tigers.
So, all three states have 1789 tigers.
More or Less? (NCERT Pg 155-156)
Question 7.
The population of leopards as per the 2022 census was 8820 in Central India and the Eastern Ghats. It had increased by 749 in comparison to the number of leopards in 2018 in the same region. How many leopards were there in 2018 ?
Answer:
8071 leopards were there in 2018.
Question 8.
Write the number of animals on this map based on the data from the problems in the previous pages.
Answer:
Let Us Do (NCERT Pg 157-160)
Question 9.
The board in the ticket office in the Kaziranga National Park shows the following:
(i) How many more visitors came in December than in November?
(ii) The number of visitors in November is 1587 more than October. How many visitors were there in October?
Answer:
(i) The number of more visitors came in December than November
=8591-6415=2176
(ii) The number of visitors in October
=6415-1587=4828
Question 10.
In a juice making factory, women make different types of juices as given below:
(i) The number of bottles of guava juice is 759 more than the number of bottles of pineapple juice. Find the number of bottles of guava juice.
(ii) The number of bottles of orange juice is 1257 more than the number of bottles of guava juice and 1417 less than the number of bottles of passion fruit juice. How many bottles of orange juice are made in a month?
(iii) Is the total number of bottles of guava juice and orange juice more or less than the number of bottles of passion fruit juice? How much more or less?
Answer:
(i) Given, the number of bottles of pineapple juice = 1348
Then, the number of bottles of guava juice =1348+759=2107
(ii) The number of bottles of orange juice = Number of bottles of guava juice +1257 =2107+1257=3364
Also, the number of bottles of orange juice = Number of bottles of passion fruit juice – 1417
=4781-1417=3364
So, 3364 bottles of orange juice are made in a month.
(iii) The total number of bottles of guava juice and orange juice =2107+3364=5471
So, the difference between number of bottles of passion fruit juice and total number of bottles of guava and orange juice
=5471-4781=690
So, the total number of bottles of guava juice and orange juice is more than the number of bottles of passion fruit juice by 690
Question 11.
In a small town, the following vehicles were registered in the year 2022. Find the number of vehicles as per the conditions given below.
(i) The number of buses is 253 more than the number of jeeps. How many buses are there in the town?
(ii) The number of tractors is 5247 less than the number of buses. How many tractors are in the town?
(iii) The number of taxis is 1579 more than the number of tractors. How many taxis are there?
(iv) Arrange the numbers of each type of vehicle from lowest to highest.
Answer:
(i) Given, the number of jeeps =6304
So, the number of buses =6304+253
=6557
(ii) We know, number of buses =6557 So, the number of tractors in the town
=6557-5247=1310
(iii) We know, the number of tractors =1310
So, the number of taxis=1310+1579
=2889
(iv) The arrangement of numbers of each type of vechicle from lowest to highest is 1310,2889,6304,6557
Question 12.
Solve
(i) 1459+476
(vi) 7293-2819
(ii) 3863+4188
(vii) 3105-1223
(iii) 5017+899
(viii) 8006-5567
(iv) 4285+2132
(ix) 5000-4124
(v) 3158+1052
(x) 9018-487
Answer:
(i) 1459+476=1935
(ii) 3863+4188=8051
(iii) 5017+899=5916
(iv) 4285+2132=6417
(v) 3158+1052=4210
(vi) 7293-2819=4474
(vii) 3105-1223=1882
(viii) 8006-5567=2439
(ix) 5000-4124=876
(x) 9018-487=8531
Question 13.
The children in a school in Chittoor are planning to organise a Baal Mela in their school. Raju, Rani and Roja decided to raise some money to make arrangements for the mela. The money is available in notes of 500, 100, 50, 10 and coins of 5, 2 and 1. They decide to put the money in the School Panchayat Bank.
Answer:
To make different combination, do yourself.
Let Us Solve (NCERT Pg 161)
Question 14.
Solve
Answer:
Question 15.
Arrange the following in columns and solve them in your notebook.
(i) 3683-971
(ii) 8432-46
(iii) 4011-3666
(iv) 5203-2745
(v) 1465+632
(vi) 3567+77
(vii) 8263+3737
(viii) 5429+3287
Answer:
(i) 3683-971=2712
(ii) 8432-46=8386
(iii) 4011-3666=345
(iv) 5203-2745=2458
(v) 1465+632=2097
(vi) 3567+77=3644
(vii) 8263+3737=12000
(viii) 5429+3287=8716
Let Us Solve (NCERT Pg 162-163)
Question 16.
Find easy ways to solve the following problems. Write the answers in the given space. Share your thinking with the grade.
(i) 8787-99= ………..
Subtract 100, then add 1.
(ii) 4596+104= ………..
(iii) 3459+21= ………..
(iv) 5010+95= ………..
(v) 4990+310= ………..
(vi) 7844-15= ………..
(vii) 260+240= ………..
(viii) 1575-125= ………..
(ix) 3999+290= ………..
Answer:
(i) 8787-99=8688
Subtract 100, then add 1
(ii) 4596+104=4700
(iii) 3459+21=3480
(iv) 5 0 1 0+9 5=5105
(v) 4990+310=5300
(vi) 7844-15=7829
(vii) 260+240=500
(viii) 1575-125=1450
(ix) 3999+290=4289
Question 17.
Use the signs <, =, > as appropriate to compare the following without actually calculating. Try to reason them out and share in grade.
Answer:
Question 18.
Use the given information to find the values. Share your reasoning with the grade.
Answer:
Question 19.
Add
(i) 2783+378
(ii) 8948+97
(iii) 7006+367
(iv) 8009+485
(v) 6062+3809
(vi) 3792+2688
(vii) 4999+3888
(viii) 5005+4895
(ix) 5768+4053
(x) 3480+479
Answer:
(i) 2783+378=3161
(ii) 8948+97=9045
(iii) 7006+367=7373
(iv) 8009+485=8494
(v) 6062+3809=9871
(vi) 3792+2688=6480
(vii) 4999+3888=8887
(viii) 5005+4895=9900
(ix) 5768+4053=9821
(x) 3480+479=3959
Question 20.
Subtract
(i) 4456-2768
(ii) 5300-467
(iii) 8067-4546
(iv) 5302-1034
(v) 8004-3107
(vi) 3400-897
(vii) 9382-4857
(viii) 7561-2933
(ix) 6478-5986
(x) 3444-2555
Answer:
(i) 4456-2768=1688
(ii) 5300-467=4833
(iii) 8067-4546=3521
(iv) 5302-1034=4268
(v) 8004-3107=4897
(vi) 3400-897=2503
(vii) 9382-4857=4525
(viii) 7561-2933=4628
(ix) 6478-5986=492
(x) 3444-2555=889
Question 21.
(i) Fill the squares with the numbers 1-9. The difference between any two neighbouring squares (connected by a line) must be odd.
(ii) Can you find other ways to fill the squares?
(iii) Can you do the same thing such that the difference between any two neighbouring squares is even?
Answer:
(i) Fill the squares with the numbers 1-9. The difference between any two neighbouring squares (connected by a line) must be odd.
(ii) Do yourself.
(iii) Do yourself.