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2. (a) 6 tens + 6 ones (b) 6 tens + 5 ones (c) 9 tens + 7 ones Practice Time 3D
(d) 7 tens + 5 ones (e) 6 tens + 5 ones 1. 25 2. 10 3. 24 4. 11
Practice Time 2D 5. 20 6. 18
1. (a) 30 (b) 20 (c) 40 (d) 70 Practice Time 3E
2. (a) 70 (b) 80 (c) 90 (d) 80 1. 5 + 6 = 11, 6 + 5 = 11, 11 – 5 = 6, 11 – 6 = 5

Practice Time 2E 2. 9 + 12 = 21, 12 + 9 = 21, 21 – 9 = 12, 21 – 12 = 9
1. (a) 33 (b) 54 (c) 42 (d) 26 3. 17 + 21 = 38, 21 + 17 = 38, 38 – 17 = 21, 38 – 21 = 17
(e) 61 (f) 83 (g) 91 (h) 96 Practice Time 3F
2. (a) 47 (b) 61 (c) 71 (d) 82 1. (a) 5 (b) 6 (c) 6 (d) 3
Think and Answer (e) 6 (f) 22
1. 10 2. 14 3. 15 2. (a) 9 (b) 17 (c) 24 (d) 21
Practice Time 2F 3. (e) 13 (f) 43 (c) 4 (d) 8
(b) 5
(a) 8
1. (a) 13 (b) 14 (c) 15 (d) 15 (e) 7 (f) 7
2. (a) 13 (b) 17 Practice Time 3G
3. (a) 11 (b) 17 (c) 14 (d) 15 1. 15 balls 2. 11 students 3. 19 books
Practice Time 2G 4. Puja, 8 stamps 5. 33 DVDs 6. 9 balloons
1. 26 2. 34 3. 92 4. 72 Mental Maths
5. 86 6. 91 1. 1 2. 94 3. 4 bananas 4. 87 5. 63
Practice Time 2H Chapter Assessment
1. 51 marbles 2. 67 beads 3. 99 marks 4. 72 balloons 1. (c) 2. (b)
5. 82 seashells 6. 97 birds 3. (a) 20 (b) 25 (c) 48 (d) 41
Mental Maths 4. (a) 24 (b) 7

1. 55 + 2 = 57, 75 + 2 = 77; 47 + 8 = 55, 67 + 8 = 75, 87 + 8 = 95; 49 + 9 = 58, 6. (a) 13 marbles (b) 3 marbles
59 + 9 = 68, 89 + 9 = 98
2. 1 + 8, 3 + 6, 4 + 5 Chapter 4. Addition and Subtraction
Chapter Assessment GET READY!
1. (b) 2. (a) 1. 53 plants 2. 42 plants 3. Ajay, 11 plants
3. (a) 34 (b) 40 (c) 58 (d) 71
4. (a) 87 (b) 46 (c) 82 Think and Answer
5. 68 ribbons 6. 45 children 1. 104 runs 2. No 3. 198
Brain Sizzlers Maths Connect
12 A’s score = 53, B’s score = 42, C’s score = 34, D’s score = 52; Winner : A
Chapter 3. Subtraction Practice Time 4A
1. (a) 127 (b) 135 (c) 109 (d) 139
GET READY! 2. (a) 121 (b) 132 (c) 153 (d) 135
1. 90 2. 80 3. (a) 141 (b) 176 (c) 188 (d) 191
Maths Connect Activity
Going up = 4 kites, Coming down = 1 kite 1. 110 2. 145 3. 103 4. 143
Life Skills 5. 164 6. 157 7. 103 8. 164
1. 10 fingers 2. 4 limbs 3. 1 nose 4. 10 toes 9. 185 10. 157
5. 2 elbows 6. 2 eyes Practice Time 4B
Practice Time 3A 1. (a) 677 (b) 749 (c) 984 (d) 550
1. (a) 22 (b) 0 (c) 0 (d) 93 2. (e) 699 (f) 688 (g) 679 (h) 199
(c) 378
(b) 178
(a) 409
(d) 279
(e) 56 (f) 1
2. (a) 6 (b) 10 (c) 19 (d) 16 Practice Time 4C
Think and Answer 1. 782 2. 873 3 629 4. 937
5.
730
1. 13 2. 15 Practice Time 4D 6. 761 7. 991 8. 638
Practice Time 3B 1. 113 cows 2. 104 pages 3. 840 students 4. 257 trees
1. (a) 2 tens + 10 ones (b) 5 tens + 1 one = 4 tens + 11 ones 5. 937 stamps
2. (a) 3 tens (b) 10 ones (c) 4 tens Brain Sizzlers
3. (a) 5 tens + 7 ones = 4 tens + 17 ones
(b) 6 tens + 3 ones = 5 tens + 13 ones 845 candies
(c) 4 tens + 4 ones = 3 tens + 14 ones Practice Time 4E
Think and Answer 1. (a) 222 (b) 200 (c) 110 (d) 204
1. 40 2. 44 2. (a) 432 (b) 733 (c) 230 (d) 800
Practice Time 3C Think and Answer
1. (a) 37 (b) 26 (c) 18 (d) 35 1. 7 2. 3
2. (a) 35 (b) 17 (c) 22 (d) 69 Brain Sizzlers
(e) 9 (f) 34 (g) 24 (h) 48 105 passengers
Maths Fun Practice Time 4F
Rocket 1. (a) 412 (b) 337 (c) 274 (d) 73
Brain Sizzlers 2. (e) 129 (f) 174 (g) 158 (h) 266
1. = 11, = 6 2. 1 (a) 849 (b) 89 (c) 126 (d) 149
(g) 355
(h) 293
(f) 148
(e) 288
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