There are 10 mm in a cm, so 8 cm in equivalent to 80 mm. 80 mm / 2 mm = 40. Therefore, 8 cm is 40 times as long as 2 mm.
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3.5 cm is 5 times as long as 7 mm, and 4 times longer than 7 mm.
Sixteen
12 cm long
1 m = 100 cm/1 m = 10 mm/1 cm =(100 cm x 10 mm) / 1 cm =1000 mm Therefore, 1 metre is 1000 times greater than 1 mm.
There are 100 cm in a meter. There are 1000 mm in a meter. So 1 mm is .1 cm. 12 mm would 12 times more or 1.2 cm.