Page 179 - MathGenius-C1-Flipbook

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Chapter assessment 4. (b) 13 (c) 10 (d) 9
1. (d) 2. (c) 4. (a) 19 (b) 18 5. (a) 12 (b) 12 (c) 2 (d) 11
5. (a) 12 (b) 16 (c) 18 (d) 19 6. (b) – (c) – (d) + (e) – (f) +
6. 18 seashells 7. Aman 7. (a) 2 (b) 11 8. 10 9. 8 10. 6
Mental Maths (Page 54) Mental Maths (Page 69)
1. (a) T (b) F (c) F 1. 4 2. 17 3. Minus 4. 6 5. 1
2. 2 + 4 = 6; 3 + 5 = 8 Challenge Question (Page 69)
Chapter 4. Subtraction up to 20 1. 15 bracelets 2. 4 candies
Get Ready! Chapter 5. Numbers 21 to 50
8 glasses of water Fast Check (Page 76)
Practice time 4a 1. 9 2. 3 3. 44; only one
1. (b) 5 (c) 6 (d) 4 (e) 4 (f) 3
2. (b) 5 (c) 3 (d) 4 (e) 1 (f) 2 Practice time 5a
Practice time 4B 1. (b) 47 = 4 tens and 7 ones (c) 38 = 3 tens and 8 ones
2. 9 3. 12 4. 11 5. 8 6. 9 (d) 21 = 2 tens and 1 one (e) 24 = 2 tens and 4 ones
Challenge Question (Page 58) 3. (f) 40 = 4 tens and 0 ones Number names Numbers
Numbers
Number names
7 balloons Twenty-three 23 Twenty-six 26
Life Skills (Page 58) Forty-two 42 Forty 40
1. 12 bananas thirty 30 Forty-five 45
Practice time 4C Twenty-nine 29 thirty-two 32
1. 7 2. 10 3. 7 4. 4 Forty-seven 47 Forty-four 44
5. 8 Thirty-six 36 twenty-two 22
Practice time 4d 4. (a) 24 (b) 33 (c) 41 (d) 50
1. (a) 2 (b) 5 (c) 1 (d) 3 (e) 4 (f) 3 6. (a) 19, 37, 42, 28 (b) 29, 43, 12, 21 (c) 22, 33, 50, 7
(g) 4 (h) 1 (i) 2 (j) 5 Challenge Question (Page 78)
2. (b) 9 (c) 8 (d) 6 (e) 5 (f) 4 (g) 3
(h) 2 (b)
Challenge Question (Page 61) Practice time 5B
(a) (c) (d) 3. (a) > (b) < (c) > (d) < (e) = (f) =
Maths Connect (Page 61) Challenge Question (Page 80)
3 steps No, 43 > 34
Practice time 4e 43 = 4 tens and 3 ones
1. (b) 2 (c) 4 (d) 7 (e) 0 (f) 1 34 = 3 tens and 4 ones
2. (b) 1 (c) 2 (d) 0 (e) 2 (f) 6 Q 4 tens is greater than 3 tens, 43 > 34.
3. (a) 1 (b) 2 (c) 4 (d) 1 Life Skills (Page 80)
Challenge Question (Page 63) 50
18 – 11 = 7 Challenge Question (Page 81)
Practice time 4F 25
1. 10 2. 12 3. 11 4. 11 5. 12 6. 10 Practice time 5C
7. 14 8. 12 1. (b) 7, 16, 27, 40 (c) 23, 26, 41, 49 (d) 14, 25, 36, 43
think tank (Page 64) (e) 11, 27, 45, 49 (f) 19, 22, 35, 40
(c) 2. (b) 41, 28, 17, 8 (c) 47, 40, 36, 14 (d) 44, 37, 26, 15
Practice time 4G (e) 41, 36, 27, 23 (f) 43, 37, 29, 24
1. 6 2. 0 3. 6 4. 0 5. 1 6. 2 Chapter assessment
7. 12 8. 16 9. 18 1. (b) 2. (c)
Practice time 4H 4. 34 = Thirty-four; 47 = Forty-seven; 45 = Forty-five; 26 = Twenty-six;
1. 5 2. 10 3. 12 4. 2 5. 12 31 = Thirty-one; 20 = Twenty; 30 = Thirty; 36 = Thirty-six;
Challenge Question (Page 66) 46 = Forty-six; 42 = Forty-two; 50 = Fifty; 39 = Thirty-nine
(c) 5. (a) 9, 14, 32 (b) 17, 38, 49 (c) 12, 37, 40
Practice time 4I 6. (a) 50, 46, 22 (b) 46, 35, 24 (c) 39, 32, 25
2. (c) 3. (d) 4. (a) 5. (b) 6. (e) Challenge Question (Page 83)
Chapter assessment 25
1. (c) 2. (b) Mental Maths (Page 83)
3. (a) 9 – 4 = 5; 9 – 5 = 4 (b) 6 – 2 = 4; 6 – 4 = 2 1. FORTY-FOUR 2. ELEVEN 3. TWENTY-TWO
(c) 8 – 3 = 5; 8 – 5 = 3 4. TWENTY-FIVE 5. FORTY-ONE 6. FORTY-NINE

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