7cm is 70mm
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1 cm = 10 mm So 7/10th of a cm is 7 mm
10 mm = 1 cm 20 mm = 2 cm 30 mm = 3 cm . . 70 mm = 7 cm
One cm contains 10 mm. So, 7 x 10 = 70 mm.
Well, honey, let me break it down for you. 7 cm is smaller than 698 mm. Why? Because centimeters are like the cute little cousin of millimeters - they're smaller. So, in this case, 698 mm is like the big boss compared to the tiny 7 cm.
3.5 cm is 5 times as long as 7 mm, and 4 times longer than 7 mm.