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Metric units
1 Howlongiseachline?
Giveyouranswerinbothcentimetresandmillimetres.
a)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm mm
b)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm mm
c)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm mm
d)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm mm
2 Completetheconversion. 1cm= mm
3 Dexterisconvertingunitsofmeasure.
CompleteDexter’sworkingstoshowthatheiscorrect.
WhatotherconversionscouldyouworkoutusingDexter’smethod?
4 Completetheconversions.
a) 15cm= mm e) cm=0.2m
b) 12m= cm f) 4.65m= cm
c) 16.5m= cm g) 52,000mm= cm
d) mm=165cm h) 52,000mm= m
©WhiteRoseMaths2020
1 m = cm
1 cm = mm
so, 1 m = mm
If I know how many millimetres are in 1 cm, and how many centimetres are in 1 m, then I can work out how
many millimetres are in 1 m.
©WhiteRoseMaths2020
5 MoandRosiearemeasuringthelengthoftheplayground.
a) Whoseunitofmeasureismoreappropriate?__________________
Explainyouranswer.
b) Rosiehasmeasuredthelengthoftheplaygroundas563cm.
WhatanswerwillMogetinmetres? m
6 EvaandAmiraremeasuringthelengthofapaperclip.
a) Whoseunitofmeasureismoreappropriate?__________________
Explainyouranswer.
b) Amirhasmeasuredthelengthofthepaperclipas0.8cm.
WhatanswerwillEvagetinmillimetres? mm
7 Thetableshowstheheightsoffoursunflowers.
Sunflower A B C D
Height 0.86m 91cm 640mm 72cm
Putthesunflowersinorder,startingwiththeshortest.
8 Thedepthofaplankis15mm.
12oftheplanksarestackedontopof
eachother.
Whatisthedepthofthestackofplanks?
Giveyouranswerincentimetres.
cm
9 Dexteris146cmtall.
Annieis0.27mshorterthanDexter.
HowtallisAnnie?
Giveyouranswerinmetres.
m
10 Thethicknessofa20pcoinis2mm.
Tommystacks£4worthof20pcoinsontopofeachother.
Howtallisthestackofcoins?
Giveyouranswerincentimetres.
cm
I’m going to measure it in metres. I’m going to measure
it in centimetres.Mo
Rosie
I’m going to measure it in millimetres.
I’m going to measure it in centimetres.Eva
Amir
TW
ENTY
PENC
E
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