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OJ pencil half-scale real length real length
length (mm) (mm) (cm)
Practical: measuring Half-scale:
a 26 52 5·2
lengths of pencils in
b 56 112 11·2 a 41 mm long, 4 mm wide
millimetres. c 35 70 7·0 b 74mm long, 4mm wide
d 52 104 10·4
e 80 160 16·0 c 55 mm long, 4 mm wide
f 76 152 15·2
9 70 140 14·0 caterpillar double- real length real length
h 87 174 17·4
i 47 q4 q·4 scale (mm) (mm) (cm)
j 60 120 12·0 a 82 41 4·1
k 86 172 17·2 b 46 23 2·3
I 66 132 13·2 c 30 15 1·5
m 7q 158 15·8 d 36 18 1·8
n 40 80 8·0 e 100 50 5·0