## Samacheer Kalvi 3rd Standard Maths Book Solutions Term 2 Chapter 2 Patterns

Recall (Text Book Page No. 19):

Circle the odd numbers in the given sequence.

(i) 26, 29, 37, 42,

45

Answer:

29, 37, 45

(ii) 85, 84, 76, 65, 64

Answer:

85, 65

(iii) 11, 22, 33, 44, 55, 66.

Answer:

11, 33, 55

(iv) 357, 896, 572, 951, 865, 423

Answer:

357, 951, 865, 423

(iv) 952, 698, 342, 780, 920, 850.

Answer:

No odd numbers.

Complete the table from the above numbers.

Answer:

Observe the number chart given below. Colour the odd numbers with green and even numbers with blue.

Answer:

We observe that odd and even numbers occur alternatively.

Complete the patterns :

i) 21, 22, 23, ____, ____, ____, ____, ____

Answer:

21, 22, 23, 24, 25, 26, 27, 28

ii) 1, 3, 5, ____, ____, ____, ____, ____

Answer:

1, 3, 5, 7, 9, 11, 13, 15

iii) 2, 4, 6, ____, ____, ____, ____, ____

Answer:

2, 4, 6, 8, 10, 12, 14, 16

iv) 85, 86, 87, 88, ____, ____, ____, ____, ____

Answer:

85, 86, 87, 88, 89, 90, 91, 92, 93

v) 39, 41, 43, ____, ____, ____, ____, ____

Answer:

39, 41, 43, 45, 47, 49, 51, 53

Let’s explore patterns while adding and subtracting odd and even numbers.

Add the following numbers:

(i)

Answer:

(ii)

Answer:

(iii)

Answer:

(iv)

Answer:

(v)

Answer:

(vi)

Answer:

Thus, we observe that addition of odd and even numbers involve a pattern.

Lets tabulate the patterns observed.

Answer:

Subtract the following numbers:

(i)

Answer:

(ii)

Answer:

(iii)

Answer:

(iv)

Answer:

(v)

Answer:

(vi)

Answer:

Let’s tabulate the patterns observed.

Answer:

Exercise (Text Book Page No. 22):

Question 1.

Make the patterns by multiplying with 10.

i) 1, 3, 5, 7, ____, ____, ____, ____

Answer:

10, 30, 50, 70

ii) 2, 4, 6, 8, ____, ____, ____, ____

Answer:

20, 40, 60, 80

iii) 1, 3, 7, 13, ____, ____, ____, ____

Answer:

10, 30, 70, 130

iv) 3, 5, 9, 15, ____, ____, ____, ____

Answer:

30, 50, 90, 150

Question 2.

Make the patterns by dividing with 10.

i) 110, 120, 130, ____, ____, ____, ____

Answer:

11, 12, 13

ii) 210, 230, 250, ____, ____, ____, ____

Answer:

21, 23, 25

iii) 470, 430, 410, ____, ____, ____, ____

Answer:

47, 43, 41

iv) 540, 470, 350, ____, ____, ____, ____

Answer:

54, 47, 35

v) 500, 210, 520, ____, ____, ____, ____

Answer:

50, 21, 52

Question 3.

Find the rule and complete the following pattern.

Answer:

**3rd Standard Maths Guide Patterns Additional Questions and Answers**

I. Complete the patterns.

(i) 31, 32, 33, ____, ____, ____, ____, ____

Answer:

31, 32, 33, 34, 35, 36, 37, 38

(ii) 7, 9, 11, ____, ____, ____, ____, ____

Answer:

7, 9, 11, 13, 15, 17, 19, 21

(iii) 12, 14, 16, ____, ____, ____, ____, ____

Answer:

12, 14, 16, 18, 20, 22, 24, 26.

**3rd Standard Maths Guide Numbers Additional Questions and Answers**

II. Make the patterns by multiplying with 10.

(i) 9, 11, 13, 15, ____, ____, ____, ____, ____

Answer:

90, 110, 130, 150, 170, ….

(ii) 10, 12, 14, 16, ____, ____, ____, ____, ____

Answer:

100, 120, 140, 160, 180,….

**3rd Standard Maths Guide Numbers Additional Questions and Answers**

III. Make the patterns by dividing with 10.

(i) 660, 640, 620, ____, ____, ____, ____, ____

Answer:

66, 64, 62, 60, …

(ii) 320, 350, 380, ____, ____, ____, ____, ____

Answer:

32, 35, 38, 40, ..

**3rd Standard Maths Guide Numbers Additional Questions and Answers**

IV. Add the following numbers.

(i) 942 + 413

Answer:

(ii) 667 + 764

Answer:

**3rd Standard Maths Guide Numbers Additional Questions and Answers**

V. Subtract the following numbers.

(i) 644 – 432

Answer:

(ii) 739 – 527

Answer: