There are 55 tenths in 5 and a half. To convert 5 and a half to tenths, you multiply the whole number (5) by 10 to get 50 tenths, then add the half (0.5) to get 5 more tenths, totaling 55 tenths.
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By 5 and a half I believe you are referring to 5.5.
Therefore we can count a tenth as 0.1
so 5.5/0.1=55.
So there are 55 tenths in 5 and a half
There are ten tenths in one whole. Therefore, 10 + 5 = 15 tenths.
There are five tenths in a half. 5/10 = 1/2
5
5 tenths is a half. So 5 tenths of 60 is a half of 60 which is 30.
Fifteen 1 and a half = 3/2 3/2 x 5/5 = 15/10