Janice is dividing 1.92 divided by 6. why does she exchange the place value blocks shown for 18 tenths and 12 ones ?

To compute 1.92 divided by 6 you can multiply 1.92 by 100, compute the division and finally, divide the result by 100. So, 1.92*100 = 192, which can be represented as 18 tenths and 12 ones. This representation is convenient because both 18 and 12 are multiples of 6. Then, dividing 18 tenths by 6 we get 3 tenths (30), and dividing 12 ones by 6 we get 2 ones (2). The addition of the results of these partial divisions is 30 + 2 = 32, which is the result of 192/6. To get 1.92/6 we need to divide 32 by 100, which is 0.32, and that's the result of 1.92/6.

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.