Busy Ant Maths Pupil Book 4a Year 4 Answers - Collins Page 6
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33Pupil Book 4B
Lesson 4: Mental multiplications
Lesson 4: Changing times
3, 4
a
700
765
800
Challenge
Challenge
1
1
1 Answers will vary.
a Poppy: 270 s, Lenny: 230 s,
b
300
353
400
Yasmin: 280 s
c
200
287
Challenge
300
2
a 3#5#8 = 120
b 280 s, 270 s, 266 s, 230 s
d
915
1000
900
b 2#8#4 = 64
Challenge
e 1500
1528
1600
2
1 a Chris: 195 min, Rob: 215 min,
c 6#5#7 = 210
d 8#9#10 = 720
Oscar: 210 min
Challenge
3
1 a 2700 , 2710, 2716, 2720 , 2800
b 195 min, 209 min, 210 min, 215 min
e 7#7#0 = 0
b 3500, 3560, 3569, 3570 , 3600
f 9#6#3 = 162
2 300 months
c 3200 , 3240, 3248, 3250 , 3300
g 6#4#9 = 216
3 168 hours
d 4600 , 4630, 4635, 4640 , 4700
h 9#7#1 = 63
e 7400, 7480 , 7482, 7490, 7500
4 Archie: 10 years, George: 11 years,
i 9#5#3 = 135
f 7200, 7250, 7255, 7260 , 7300
Emma: 9 years, Sarah: 12 years
j 2#9#5 = 90
2 Answers will vary.
k 6#10#7 = 420
Challenge
3
1 22 June: 17 h 55 min
l 4#6#4 = 96
Lesson 4: Negative numbers
22 December: 8 h 45 min
Challenge
3
2 9 h 10 min
Challenge
1 Answers will vary.
1
a −5, −4, −3, −2, −1, 0, 1, 2, 3, 4
2 Answers will vary.
b −8, −7, −6, −5, −4, −3, −2, −1, 0, 1
Pupil Book 4B
c −10, −9, −8, −7, −6, −5, −4, −3, −2,
Unit 4, Week 3: Measurement (time)
−1
Unit 5, Week 1: Number _ Number and
d −15, −14, −13, −12, −11, −10, −9,
Lesson 1: Converting units of time
−8, −7, −6
place value
Challenge
e −19, −18, −17, −16, −15, −14, −13,
1
1 min = 60 s
−12, −11, −10
Lesson 1: Ordering numbers beyond 1000
1 hour = 60 min
f −25, −24, −23, −22, −21, −20, −19,
1 day = 24 h
Challenge
1
1 a 1736, 2356, 3871, 5197
−18, −17
1 week = 7 days
b 1836, 2645, 3982, 5812
g −28, −27, −26, −25, −24, −23, −22,
1 year = 12 months, 52 weeks, 365 days
c 1088, 2677, 3721, 4876
−21, −20, −19
Challenge
d 1889, 2776, 3121, 5222
2
1 a 240 min
b 360 min
c 525 min
Challenge
2
1 a −8
e −14
2 a 1065, 1289, 1487, 1578
2 a 120 h
b 216 h
c 360 h
b −2
f −18
b 3166, 3255, 3498, 3825
3 a 49 days
b 84 days
c 364 days
c −5
g −22
c 5111, 5216, 5538, 5754
4 a 2 days 2 h
b 3 h 20 min
d −11
h −30
d 4166, 4286, 4622, 4826
c 6 min 40 s
d 8 weeks 4 days
Challenge
2
1 a 2178, 2789, 4791, 4879
Challenge
2 a
−20 −21 −22 −23 −24 −25
3
1 a 91 days
b 13 weeks
b 4277, 4722, 6187, 6372
c 3143, 3521, 3734, 3981
2 Answers will vary.
b
−18 −19 −20 −21 −22 −23
d 7256, 7454, 8256, 8454
Lesson 2: Using 12-hour clocks
c
−21 −22 −23 −24 −25 −26
2 Answers will vary.
Challenges
1, 2
1 a
5:12
b 8:06
c 10:27
Challenge
d
3
−24 −25 −26 −27 −28 −29
1 Answers will vary.
d 10:57 e 8:46
f 12:35
2 Answers will vary.
2 a 23 min past 4
b 18 min to 8
e
−33 −34 −35 −36 −37 −38
c 9 min past 10
d 4 min to 9
Lesson 2: Place value problems
f
−39 −40 −41 −42 −43 −44
e 25 min past 2
f 29 min to 6
Challenge
1
Answers will vary.
Challenge
g
−46 −47 −48 −49 −50 −51
2
1 a 11:32
b 11:54
c 12:25
d 11:16
Challenge
2
Answers will vary.
2 a 2:40 p.m.
b 12:20 p.m.
h
−50 −51 −52 −53 −54 −55
c 1:10 p.m.
d 12:55 p.m.
Challenge
3
Answers will vary.
Challenge
3
1 a −39
e −57
Challenge
3
1
23 min early; 22 min late; 11 min early
Lesson 3: Rounding to the nearest 10 or 100
b −43
f −60
2 a 10:53
d 3:26
Challenge
c −48
g −65
1
1, 2
b 2:12
e 8:55
d −51
h −72
a
140
147
150
c 4:39
f 12:01
b
180
189
190
Lesson 3: Using 24-hour clocks
c
230
231
240
2 a
−69 −70 −71 −72 −73 −74
d
350
358
360
Challenge
1, 2
1 a 08:15
b 05:40
c 10:27 d 07:55
b
−75 −76 −77 −78 −79 −80
e
720
725
730
2 a 14:35
b 15:50
c 23:09 d 21:20
f
860
866
870
c
−79 −80 −81 −82 −83 −84
g
673
680
670
Challenge
2
1 a 06:05
b 07:30 c 16:51
h
740
744
750
d
d 14:35 e 21:33
f 21:43
−86 −87 −88 −89 −90 −91
Challenge
2
1, 2
2 a 2:45 p.m. b 10:10 p.m. c 7:57 a.m.
e
−93 −94 −95 −96 −97 −98
a
870
875
d 3:20 a.m. e 7:32 p.m.
f 8:06 p.m.
880
b
740
749
750
f
Challenge
−99 −100 −101 −102 −103 −104
3
10:12
10:27
10:42
10:57
c
1830
1837
1840
11:12
11:27 11:42 11:57
d 2560
2568
2570
g
−105 −106 −107 −108 −109 −110
12:12
12:27 12:42 12:57
e 2370
2371
2380
13:12
13:27 13:42 13:57
541
BA Answers_Final.indd 541
BA Answers_Final.indd 541
14/02/2014 16:37
14/02/2014 16:37
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