Because when there is one ten you have to put it in the other place value
180
480?
Ten.
18 tens = 180
The number 68.
18 tens = 180 18 tenths = 1.8
6*100 + 18*10 = 600 + 180 = 780
It is: 300+80+18 = 398
the value of 18 tens is 180
5 13/18.
(18 x 20) = 360 That's 36 tens. You could look at it this way: 20 = 2 tens; 18 x (2 tens) = (18 x 2) tens = (36) tens