17 tens = (10 + 7) tens = 10 tens + 7 tens = 1 hundred + 7 tens.
7
6 tens
31 tens(310)
190 + 130 = 320
I do not officially know, but it is safe to say they've sold tens of thousands of copies. They've sold in not only America and the UK, but in Australia, France, etc. And, not only that, but they've been producing these hundreds of copies for nine straight years! So, it's completely safe to say they've sold tens of thousands of copies.
190
16.8 tens, or 16 tens with 8 left over.
3 tens is written as 30 0 tens is written a 0
5
9
24 tens x 24 =