Page 64 - 01-Yr5_Front cover-ccp.indd

66
• Babies' weights • • • • • • •••••••••••••
QJ The weights of five newborn babies are given below. tIJ Explainwhytheseweights ~ 3·10kg .........
Write each of their weights as: • kilograms and grams, e.g. 3 kg 144 g are equivalent. ..... ~
• grams only. @] Write the number of grams represented by the red digit each time.
'~ @] a 1·345kg b 4·036kg c 3·005kg d 2·999kg
This table shows weights in kilograms (rounded to one
decimal place) of babies born during one week
' in a hospital.
~~ 2·3 4·7 3·8 2·9 3.9 1·9 4·1 3·5 4·8
'~'" ~ ,~::, 3·1 3·7 1-6 5·0 3·2 2·3 4·2 2·8 3·9
Emma
d&~·cl. Iqbal ~··/ 3·3 3·9 3·0 3·5 3·6 3·1 3·2 2·7 2·6
1-8
3·2
3·8
3·2
4·4
4·0
2·9
3·7
1·8
•
! /
3·484kg
-. " 0 • t,._ • Choose equal class intervals and
design a frequency table for the data. See pages 22 and 23
if you've forgotten
• Then design a frequency graph whot todo.
;f
Charlie
of the results.
DJ 2·634kg 1·857kg m What is the modal weight for your frequency graph?
Bethon
lIJ
a Emma 4 kg %g or 40%g You could analyse Charlie's [!] Write at least four questions to ask about your frequency graph
weight like this.
1E·8~' L_ 1g'7 and the answers you expect.
Analyse the other babies' L_ 109xS
b David 3 kg 705 g or 3705 g weights in the' same way.
R.
1009x8 CHALLENGE ~-'
10009 x 1 • Fred, Ge.orge and Harry a.re triplets. ~n ,
c Iqbal 3 kg 484 g or 3484 g Together they weigh 7 kg. . 1 ;> •
7779
@:] Draw at least 5 more Bethan --Charlie • Fred is 50 g heavier than George. _... ..-:::: fl/
arrows like this. George 1s 100 g heavier than Harry.
d Bethan 2 kg 634 g or 2634 g Show your workings-out. - _.,...represents 'ls •g heavier than' • What does each baby weigh? · ·
,,,. ... ,,., m
e Charlie 1 kg 857 g or 1857 g
j"° Q~-k_g ___ 1_06H ~ ~ r 0 5~k_g ____ _~~ ~ ~ ~ three and one-tenth kg. c 5g d qoog
Emma 5 David They all mean 3 kg and 100 g or a 40g b 4000g
10 1
[I]
Iqbal 1 r~4-k_g ____ l 6~ ~ ~ ~ Beth an 2~·i34kg 1gx4 Practical: design a frequency table 3·2kg
10g x 3 and graph for given information.
100 g x 6 Possible frequency chart:
1000 g x 3 1000 g x 2
Weight Tally Frequency Open: writing four questions about
1 ·6 - 2· 1 1111 4 the graph and answering them.
3qo9 2119 8509
Possibilities: Emma~ David David ~ Iqbal Iqbal~ Bethan 2·2 - 2·7 1111 4 Challenge
6119 10719 16279
Emma~ Iqbal David ~ Bethan Iqbal ~ Charlie 2·8 - 3·3 ttH- ffH. I 11 Harry weighs 2·25 kg, George
3·4 - 3.q ttH- ffH. 10 weighs 2·35 kg, Fred weighs 2·4 kg.
14619 18489
Emma ~ Bethan David ~ Charlie 4·0 - 4·5 1111 4
22389
4·6 - 5-1 Ill 3
Emma~ David