The book was written by my friend. (Past Simple Passive)
The letter was sent by his mother yesterday. (Past Simple Passive)
That ancient monument was shown to us 2 years ago. (Past Simple Passive)
The detail is made of steel. (Present Simple Passive)
A new plan is worked out. (Present Simple Passive)
These goods are produced in China. (Present Simple Passive)
Our manager will be sent to Paris next week. (Future Simple Passive)
This projext will be finished in a week. (Future simple passive)
The house will be built in a month. (Future simple passive)
1) 48:12=7
2)15*4=60
3)48+60=108
Объяснение:
надеюсь