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:
