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\ 17-Nov-2025 Surender Singh Rothan Proof-7 Reader’s Sign _______________________ Date __________

Exercise 6B 2. a. 40 b. 54 c. 16 d. 30 e. 78
1. a. 66, Sixty-Six b. 55, Fifty-Five c. 89, Eighty-Nine f. 97 g. 28 h. 66
2. a. 52, 54, 56, 58, 59 b. 61, 63, 66, 67, 69, 70 3. a. = b. = c. > d. < e. >
c. 76, 77, 78, 80, 81, 82, 83 f. > g. < h. > i. <
3. 1 2 3 4 5 6 7 8 9 10 4. a. 36, 49, 57, 68, 74 b. 32, 43, 60, 61, 83 c. 59, 65, 70, 81, 100
11 12 13 14 15 16 17 18 19 20 5. a. 92, 81, 73, 67, 53 b. 91, 82, 70, 63, 59 c. 80, 73, 70, 65, 60
21 22 23 24 25 26 27 28 29 30 Exercise 6E
31 32 33 34 35 36 37 38 39 40 1. a. 21, 23, 25, 27 b. 8, 10, 12, 14, 16 c. 31, 33, 35, 37, 39
41 42 43 44 45 46 47 48 49 50 2. a. 14, 17, 20, 23 b. 10, 13, 16, 19, 22 c. 26, 29, 32, 35, 38
51 52 53 54 55 56 57 58 59 60 3. a. 30, 35, 40, 45, 50 b. 34, 39, 44, 49, 54 c. 57, 62, 67, 72, 77
61 62 63 64 65 66 67 68 69 70 4. a. 50, 60, 70, 80, 90 b. 57, 67, 77, 87, 97 c. 41, 51, 61, 71, 81
71 72 73 74 75 76 77 78 79 80 Learning Logs
81 82 83 84 85 86 87 88 89 90 1. a. Seventy-three b. Forty-four c. Eighty-one
91 92 93 94 95 96 97 98 99 100 d. Sixty-eight e. Sixty-four f. Seventy-seven
2. a. 68 b. 99 c. 46 d. 72 e. 69 f. 29
4. 100 90 80 70 60 3. a. 50 + 3 b. 40 + 1 c. 60 + 7 d. 80 + 4
99 89 79 69 59 4. a. 50 b. 73 c. 74 d. 95
98 88 78 68 58 5. a. > b. < c. < d. > e. > f. =
97 87 77 67 57 6. a. 42, 67, 81, 83, 89 b. 27, 64, 70, 78, 95 c. 32, 35, 40, 86, 91
96 86 76 66 56 7. b. 3 tens + 8 ones → 38 → 30 + 8 c. 5 tens + 9 ones → 59 → 50 + 9

95 85 75 65 55 d. 9 tens + 6 ones → 96 → 90 + 6 e. 8 tens + 3 ones → 83 → 80 + 3
8. a. 24, 26, 28, 30 b. 35, 40, 45, 50 c. 45, 55, 65, 75 d. 40, 43, 46, 49
94 84 74 64 54
Mental Maths
93 83 73 63 53 1. > 2. < 3. < 4. > 5. >
92 82 72 62 52
91 81 71 61 51 Chapter 7: Addition and Subtraction up to 100
5. a. 73 b. 85 c. 99 d. 57 Warm Up
6. a. b. c. d. 1. 7 + 5 = 12 2. 8 + 10 = 18 3. Aditya, 18 – 12 = 6 4. 11 - 4 = 7
Exercise 7A
1. a. 32 b. 36 c. 40 d. 31 e. 38 f. 68
g. 70 h. 69 i. 73 j. 79 k. 88 l. 89
T O T O T O T O m. 86 n. 91 o. 99
2. a. 59 b. 78 c. 79 d. 68 e. 89
7. a. 44, 60, 77, 81, 78 b. 49, 62, 89, 37, 42 c. 63, 45, 67, 41, 57 3. a. 28, 20 + 4 + 4 = 28 b. 59, 50 + 3 + 6 = 59
Activity c. 79, 70 + 7 + 2 = 79 d. 29, 20 + 6 + 3 = 29
a
Exercise 7B
S 1. 50 2. 60 3. 80 4. 60 5. 70
b i 6. 60 7. 80 8. 70 9. 90 10. 80
Exercise 7C
N x 37 = 3 tens + 7 ones 64 = 6 tens + 4 ones
i c T 1. a. + 42 = 4 tens + 2 ones b. + 23 = 2 tens + 3 ones
N E y 79 = 7 tens + 9 ones 87 = 8 tens + 7 ones
E i T 37 + 42 = 79 64 + 23 = 87
c. 73 = 7 tens + 3 ones d. 53 = 5 tens + 3 ones
T g h
+ 15 = 1 tens + 5 ones + 44 = 4 tens + 4 ones
y d h u N D r E D
88 = 8 tens + 8 ones 97 = 9 tens + 7 ones
S T E 73 + 15 = 88 53 + 44 = 97
e F i F T y N i N E 2. a. 85 b. 91 c. 99 d. 85 e. 69
f. 77 g. 89 h. 67 i. 39 j. 86
x
k. 55 l. 99
Exercise 6C Exercise 7D
1. b. 4 tens + 2 ones, 40, 2 b. 7 tens + 6 ones, 70, 6 1. 19 Marbles 2. 29 Fruits 3. 35 people 4. 67 Trees 5. 59 students
d. 8 tens + 5 ones, 80, 5 e. 6 tens + 8 ones, 60, 8 T O T O T O T O T O
2. b. 57 c. 70 d. 49 e. 52 f. 80 1 4 1 7 2 2 5 2 3 2
3. 51 = 50 + 1, 44 = 40 + 4, 60 = 60 + 0, 29 = 20 + 9 + 5 + 1 2 + 1 3 + 1 5 + 2 7
Activity 1 9 2 9 3 5 6 7 5 9
2. c 3. a 4. c 5. b Exercise 7E
Exercise 6D 1. a. 35 b. 41 c. 32 d. 32 e. 41 f. 41
1. a. 51 b. 68 c. 72 d. 99 e. 64 g. 50 h. 45 i. 82 j. 81 k. 91 l. 91
f. 79 g. 99 h. 88 2. 9 + 9 = 18 = 18 - 0, 10 + 2 = 12 = 15 - 3, 16 + 1 = 17 = 18 -1, 11 + 3 = 14 = 16 - 2

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Answers