simple present tens of tore is tear.
"Theirs" is a possessive pronoun that indicates ownership in the present tense.
Present perfect is -- have /has + past participleThe past participle of go is gone.have gone -- They have gone for a walk.has gone -- She has gone for a walk.
17 tens = (10 + 7) tens = 10 tens + 7 tens = 1 hundred + 7 tens.
7
6 tens
31 tens(310)
190 + 130 = 320
Estimates vary. Several tens of billions at the most conservative. We do not have the technology at present for a manned mission to Mars.
190
16.8 tens, or 16 tens with 8 left over.
3 tens is written as 30 0 tens is written a 0