1.   Напишите уравнения реакций в молекулярной и ионной фор­мах, при помощи которых можно осуществить превращения по схеме:

Са →  Са (N03)2 → СаС03 → С02 → Са (НС03)2

1. His great (achieve) were (enter) the university and (find) a good job. 2. My friend was (able) to do this difficult task. 3. The (academy) year lasts from September till June for students. 4. The female-(act) performed very terrific and were very beautiful 5. In (add) the topic was not discussed in public. 6. He has (allergic) to cats and can’t live with them in the same flat. 7. When I was little I (allow) to watch funny cartoons late in the evening 8. The man took some drugs and was (addict) 9. The old lady suffered from (anxious) according to everything. 10. I am mad about my new classmate’s (appear). 11. He was so (argument) that everybody listened to him with attention. 12. They’ve filled (apply) forms and now they are waiting for the results. 13. The teacher checks the (attend) of all pupils. 14. He was (attract)-charming. 15. It was an (believe) story. Nobody could say a word. 16. The (builder) were working from 3 till 8 yesterday. 17. She felt (comfort) and decided to leave. 18. He was shy and (communicate). 19. The (compete) will be next month. 20. The (crime) situation in our city is very (danger) 21. This newspaper is (day) 22. My mother’s (decide) are not discussed.

Как решить 1 целая 5 шестых, минус три целых 8 девятых??