Class 1 — Chapter 6: Vegetable Farm

6.1 Introduction & Addition in the Farm

Rumi and Shami helped each other taking out vegetables from the field. Each of them took a basket and plucked the vegetables. Let us find out how many vegetables they both took out altogether.

Addition Examples

A. Tomatoes: $7$ tomatoes and $5$ tomatoes altogether make $12$ tomatoes.
$$7 + 5 = 12$$
B. Carrots: $9$ carrots in one basket and $4$ carrots in another basket.
$$9 + 4 = 13$$
C. Radishes: $8$ radishes in one basket and $8$ radishes in another basket.
$$8 + 8 = 16$$

Project Work

Plant any vegetable sapling at your home, school, or nearby place. Share your experiences with your family and take care of the sapling. You may draw or take pictures of the growing sapling.

6.2 Beads and Mala (Ginladi Addition)

Learn how to add numbers using a ginladi (bead string).

Counting on Ginladi

To add $12$ and $4$ on a ginladi:

First, count $12$ beads.
Then, count $4$ more beads: $13, 14, 15, 16$.
So, $$12 + 4 = 16$$

Practice Exercises

Show how you can add these numbers on a ginladi:

$13 + 4 = 17$
$14 + 5 = 19$
$6 + 8 = 14$
$5 + 7 = 12$

6.3 Addition Strategies

Hop and Find the Sum

Use a number strip from $1$ to $20$ to hop and find the sum:

$8 + 5 = 13$
$13 + 3 = 16$
$2 + 16 = 18$
$4 + 12 = 16$

Fill in the missing numbers to complete the sum:

$5 + 3 = 8$
$10 + 3 = 13$
$5 + 5 = 10$
$10 + 8 = 18$

Add in Your Own Way

Example A: Sapna has $12$ coloured pencils and Gauri has $6$ coloured pencils. How many pencils do they have in all?

Sapna's Method (Counting on): Sapna counted $12$ and then $6$ more: $12, 13, 14, 15, 16, 17, 18$.
$$12 + 6 = 18$$
Gauri's Method (Splitting): Gauri split the number $12$ into $10 + 2$:
$$12 + 6 = 10 + 2 + 6 = 10 + 8 = 18$$

Example B: Aman has $8$ laddoos and Charanjeet brought $6$ laddoos. How many laddoos are there in all?
$$8 + 6 = 14$$

Example C: Sheena has $12$ bangles, she got $6$ more from her sister. How many bangles does she have now?
$$12 + 6 = 18$$

6.4 Subtraction

Practice subtraction with different numbers:

Example: $15 - 9 = 6$
A. $16 - 4 = 12$
B. $12 - 5 = 7$
C. $14 - 7 = 7$
D. $16 - 6 = 10$
E. $15 - 5 = 10$
F. $15 - 0 = 15$
G. $17 - 9 = 8$
H. $13 - 3 = 10$

6.5 Hop and Jump

Anjali and Renu are playing by hopping and jumping on a number strip:

Anjali: "I am jumping $2$ steps ahead from $6$." ($6 + 2 = 8$)
Renu: "I am jumping $7$ steps back from $15$." ($15 - 7 = 8$)
Both reach the same place: $8$.

Add, Subtract and Match

Match the operations that yield the same result:

$10 + 2 = 12$ matches with $15 - 3 = 12$
$11 + 3 = 14$ matches with $16 - 2 = 14$
$8 + 7 = 15$ matches with $17 - 2 = 15$
$16 + 1 = 17$ matches with $18 - 1 = 17$
$9 + 9 = 18$ matches with $18 - 0 = 18$

6.6 Problem Stories

Solve the following word problems:

A. A potter had $9$ diyas. He sold $5$ diyas. Then he made $7$ more diyas. How many diyas does he have now?
$$9 - 5 + 7 = 11\text{ diyas}$$
B. $6$ children sit in the bus at the first stop. At the second stop, $8$ more children board the bus. $7$ children get down at the third bus stop. How many children are there in the bus at the third stop?
$$6 + 8 - 7 = 7\text{ children}$$
C. There are $18$ seats in a bus. If $9$ children are already sitting in it, how many more children can sit inside the bus?
$$18 - 9 = 9\text{ children}$$
D. Kuljeet got $14$ toffees in her box. She shared a few toffees with her friends. She was left with $6$ toffees. How many toffees did she share with her friends?
$$14 - 6 = 8\text{ toffees}$$
E. Raman got $12$ bananas and ate a few of them. He is left with $5$ bananas. How many bananas did he eat?
$$12 - 5 = 7\text{ bananas}$$

Mathematics: Class 1 — Chapter 6: Vegetable Farm