Page 88 - steps 4b 02.pdf

• Answers 4b • • • • • • • • • • • • • • • • • 7

2 DRM63
1 Lothian, N.Irelond, Dyfed, Orkney, London
2 Dyfed, Lothian, N.Irelond, Orkney, London
3 Orkney, London, Lothian, N.Irelond, Dyfed
4 Dyfed, Lothian, N.lreland,London, Orkney
5 Orkney, London, Lothian, N.lrelond, Dyfed
6 Orkney, London, Lothian, N.Irelond, Dyfed
2 house
species starting tit blackbird chaffinch robin
sparrow
median 4·3 3·3 3·3 2·3 1·7 1·1
mode 6·8 7·7 5·4 2·4 4·4 1·5
mean 4·7 4·4 3· 1 2· 1 1·7 1·1
range 3·8 5· 1 5·4 o-q 4·4 1·0
3 Open

DRM64
£10 £1 lap lp to to I
...... ...... ...... £11 ·10
v v
DRM60 v £11•01
1 Britain: United States: v
weight of rubbish weight of rubbish v v £10·11
1 adult 800kg 0·8t v v v £1·11
5 adults 2000 kg 2·0 t 4000kg 4·0t
1 0 adults 4000 kg 4·0 t 8000kg 8·0t 2 £10 £1 lap lp total £10 £1 lap lp total
............ ...... £21·00 vv v £2·10
2 paper and cord: 132 kg
vegetables, etc: 80 kg vv v £20·10 vv v £2•01
plastics: 44 kg vv v £20·01 v vv £1•20
gloss: 36kg
dust, etc.: 32 kg v vv £12·00 v vv £1•02
metal: 28kg v vv £10·20 vv v £0•21
textiles: 8 kg v
miscellaneous: 40 kg vv £10·02 v vv £0·12
3
DRM 61 2p Sp 10p 50p
2 number of games:
Australia: 2
Asia: 2 50p 10p Sp 2p
America: 6
Europe: 14
Sp 2p 50p 10p
total value of each line:
3 a median: 4
67p
b mode: 14
10p 50p 2p 5p total value of all 1 O lines:
c range: 14 - 2 = 12
£6.70
e 4 The mean is 24 + 4 = 6.
DRM65
DRM62 1 amount
2 a 145 b 357 c 238 cost shopkeeper's method tendered change
154 375 283 +Ip +I Op +20p +50p +£2
415 537 328 £2·1Q-+ £2·20--+ £2·30--+ £2·50--+ £3--+ £ 5 £2·81
+2p
+2p
451 573 382 £5·46-+ £5·48--+ £5·50--+ £6--+
+£4
+50p
514 735 823 +Ip +5p +20p +50p £ 10 £4·54
541 753 832 £4·24--+ £4·25--+ £4·30--+ £4·50--+ £5
2220 + 6 = 370 3330 + 6 = 555 2886 + 6 = 481
+£5 ! +£10
2+3+8=13
1+4+5=10 3+5+7=15 £10--+ £20 £15·76
370 + 10 = 37 555 + 15 = 37 481+13 = 37 +5p +20p +£1
£3·75-+ £3•80-+ £4-+ £ 5 £1·25
3 Open +Ip +20p +20p +£2
£7·5Q--+ £7·60--+ £7·80--+ £8--+ £10 £2·41
4 With 3 different digits, the answer is always 37. +2p +IOp +£3 +£5 +£10
£1·88-+ £1•q()-+ £2-+ £5-+ £10-+ £20 £18·12
2 a £2·8Q + £2·8Q + £1 ·4Q = £7·27
b £2·73

@ HarperCollinsPublishers Ltd 1997 STEPS 4b Differentiation Pack