How do u change the questions im going to show u?

change the following millimetres to cantimetres

30mm 55mm 13mm 67mm 86mm 164mm 127mm and 936 in primary anwers and I've got more if u want more

Milimeters are 1/1000

centimters are 1/100

so from milli to centi you just divide by 10

so 30 mm = 3 cm

55 mm=5.5 cm

13 mm=1.3 cm

67 mm = 6.7 cm

86 mm = 8.6 cm

164 mm = 16.4 cm

127 mm = 12.7 cm

936 mm = 93.6 cm