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Practice each question, then open the answer or worked solution.
What are the ways in which the sunflower and marigold are planted?
18 = ______ × ______
So, there are ______ rows with ______ plants each.
18 = ______ × ______
So, there are ______ rows with ______ plants each.
Ans : Here,
$18 = 1 \times 18$, so there is 1 row with 18 plants.
$18 = 2 \times 19$, so there are 2 rows with 9 plants each.
Jars in the Shelf Bheema made a shelf for 30 jars. This is a long shelf with two rows. Each row has the same number of jars. Can you think of other ways to make a shelf to keep 30 jars?
Draw a shelf. Show how many jars you will keep in each row. How many rows are there?
Have your friends drawn it in different ways?
Ans: Yes, we can make a shelf in 3 rows in which each row has 10 jars. The shelf looks like as given below figure :
Number of jars in each row $ = 30 \div 3 = 10$
The other ways to keep the jars as follows
5 rows containing 6 jars in a row
6 rows containing 5 jars in a row
Help Bunty to make the table of 7, using tables of 4 and 3.
Ans : Here for solving this,
We will use the tables of 4 and 3 for writing the table of 7.
Pictorial representation :
Which two tables will you use for writing the table of 12?
Ans: Here for solving this,
We will use the tables of 5 and 7 for writing the table of 12.
The table of 5 is given below:
The table of 7 is given below:
Now, the table 12 has become as given below:
$5 + 7$ | $10 + 14$ | $15 + 21$ | $20 + 28$ | $25 + 35$ | $30 + 42$ |
12 | 24 | 36 | 48 | 60 | 72 |
$35 + 49$ | $40 + 56$ | $45 + 63$ | $50 + 70$ |
84 | 96 | 108 | 120 |
Pictorial Representation :
How many legs ? | 4 | 8 | 12 | |||||
How many cats ? | 1 | 2 |
So 28 legs mean _______ cats.
Ans : Here,
Number of legs of 1 cat $ = 1 \times 4 = 4$
Number of legs of 2 cats $ = 2 \times 4 = 8$
Number of legs of 3 cats $ = 3 \times 4 = 12$
After reading the above data , we can easily fill the given table :
How many legs ? | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 |
How many cats ? | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
So, from the table we can see that 7 cats have 28 legs.
Billo has kept his chickens in a box. He counted 28 legs. How may chickens are there ?
Ans: A chicken has 2 legs. So, If there are total 28 legs then the number of chickens kept in the box :
$ = 28 \div 2 = 14$
How many legs ? | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 | 28 |
How many chickens? | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
From the table, we can see 14 chickens have 28 legs.
Thus, 14 chickens are there in the box.
Leela has not gone to school for 21 days. For how many weeks was she away from school?
Ans: Number of days Leela did not go to school $ = 21$days.
A week has 7 days so the number of weeks Leela did not go to school $ = 21 \div 7 = 3$
$\;\;3\\7)\overline{21}\\\;-21\\ \;\; \overline{0}$
How Many Days? | 7 | 14 | 21 |
How Many Weeks? | 1 | 2 | 3 |
Here, 21 days means 3 weeks.
Thus, Leela did not go to school for 3 weeks.
A frog jumps 3 steps at a time starting from 0.
Count the jumps he takes to reach 27. So, he has taken$27 \div 3 = $______ jumps.
He has taken _________ jumps, if he is at 36.
If he is at 42, he has taken _________ jumps. Starting from 0, a rabbit jumps 5 steps at a time.
In how many jumps does he reach 25? ____________
He reaches ____________ after taking 8 jumps. • He needs ____________ jumps to reach 55.
Ans: Here,
Number of jumps taken by the frog to cover 3 steps $ = 1$
Number of jumps taken by the frog to cover 27 steps = $27 \div 3 = 9$
So, he has taken $27 \div 3 = 9$ jumps.
Number of jumps taken by the frog to cover 3 steps $ = 1$
Number of jumps taken by the frog to cover 36 steps $ = 36 \div 12 = 3$
He has taken 12 jumps, if he is at 36.
Number of jumps taken by the frog to cover 3 steps $ = 1$
Number of jumps taken by the frog to cover 42 steps $ = 42 \div 3 = 14$
If he is at 42, he has taken 14 jumps.
Number of jumps taken by the rabbit to cover 5 steps $ = 1$
Number of jumps taken by the frog to cover 25 steps $ = 25 \div 5 = 5$
Thus, the rabbit will reach 25 in 5 jumps.
Number of steps covered in 1 jump = 5
Number of steps covered in 8 jumps $ = 5 \times 8 = 40$
He reaches 40 after taking 8 jumps.
Number of jumps taken by the rabbit to cover 5 steps $ = 1$
Number of jumps taken by the frog to cover 55 steps $ = 55 \div 5 = 11$
He needs 11 jumps to reach 55.
Practice Time
$\mathbf{28 \div 2 =} $
Ans: $\;\;\;14\\2)\overline{28}\\-2\\ \;\;\;\overline{08}\\\; -8\\ \;\;\;\;\; \overline{0}$
$\mathbf{56 \div 7 =} $
Ans :
$\;\;\;8\\7)\overline{56}\\-56\\ \;\;\;\;\;\overline{0}$
$\mathbf{48 \div 4 =} $
Ans $\;\;\;12\\4)\overline{48}\\ \;-4\\ \;\;\;\overline{08}\\\; -8\\ \;\;\;\;\;\overline{0}$
$\mathbf{66 \div 6 =} $
Ans: $\;\;\;11\\6)\overline{66}\\ \;-6\\ \;\;\;\overline{06}\\\; -6\\ \;\;\;\;\;\overline{0}$
$\mathbf{96 \div 8 =} $
Ans: $\;\;\;12\\8)\overline{96}\\ \;-8\\ \;\;\;\overline{16}\\\; -16\\ \;\;\;\;\;\overline{0}$
$\mathbf{110 \div 10 = }$
Ans: $\;\;\;11\\10)\overline{110}\\ \;-10\\ \;\;\;\overline{10}\\\; -10\\ \;\;\;\;\;\overline{0}$
He took 28 shells for one necklace. 112 − 28 = 84 Now he was left with 84 shells. Again he took 28 more shells for the second necklace.
How many shells are left now? __________ Then he took shells for the third necklace.
So he was left with ___________ shells.
How many necklaces can Dhruv make from 112 shells? _________
Are the shells enough for making necklaces for all his friends? ___________.
Ans: After making the first necklace, Dhruv was left with 84 shells.
Number of shells used for the second necklace $ = 28$
Number of shells left with Dhruv$ = 84 - 28 = 56$
Working: $ = 84 - 28 = 56$Thus, Dhruv was left with 56 shells after making the second necklace.
Dhruv took 28 more shells for making the third necklace.Number of shells left with
Dhruv after making third necklace $ = 56 - 28 = 28$
Dhruv made a necklace of 28 shells for each of his three friends.
After making the necklaces for his friends, he was left with 28 shells.
So, he could make one more necklace with the remaining shells. Thus, Dhruv could
make a total of 4 necklaces with 112 shells.
Yes, the number of shells were enough for making necklaces for all the friends. After
making 3 necklaces for his friends, 28 shells were still left with Dhruv.