25 tenths.
There are five tenths in a half. 5/10 = 1/2
5
15
7 1/2 = 7 + 1/2 = 7 + 0.5 = 7.5 (5 tenths) * * * * * I suspect that the question was about how many tenths in the whole of seven and a half. That is, 7.5/(1/10). And the answer to that , is 75
25 tenths.
There are five tenths in a half. 5/10 = 1/2
5
7 1/2 = 7 + 1/2 = 7 + 0.5 = 7.5 (5 tenths) * * * * * I suspect that the question was about how many tenths in the whole of seven and a half. That is, 7.5/(1/10). And the answer to that , is 75
You solve this by dividing 1 1/2 by 1/10.
1/2 = 5/10
If you assume that number 1 equals 10, then there are ten tenths in this. If you take the number up to 3.5, then this would be 35 tenths. However, if you are asking how many tenths are there in 3 and a half from the NUMBER 10, then this works out at 2.85.
Fifteen 1 and a half = 3/2 3/2 x 5/5 = 15/10
25 tenths
75 one-tenths
Five one tenths make one half. 5*(1/10) = 0.5 = 1/2
five 5/10 = 1/2