.9 is the same as 9/10
If you mean 3*10 and 9/100 then it is 30.09 as a decimal
6.6
"9 tens" would be 90. If you meant to write "9 tenths" the answer would be 0.9
In the decimal system, the largest digit in any place is 9.
write the number 9write some numbers to the left of the 9. These are tens, hundreds, etcput a decimal place to the right of the 9 you wrote in step 1, and write some more numbers to the right of that. these are tenths, hundredths, etc
If you mean 3*10 and 9/100 then it is 30.09 as a decimal
678.09
30.09 . unless not tens but tenths is meant 3 tenths and 9 hundredths = 0.39
15 tens = 150
74749
0.30.
30.0
It is 0.4
6.6
259
It is 3.8
It is 230.