Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Robert avait 25 balles. Tim lui a donné la moitié de ses 40 balles. Combien de balles a maintenant Robert ?


### Response:
 Tim a donné 1/2*40=<<1/2*40=20>>20 balles à Robert.
Robert a maintenant 25+20=<<25+20=45>>45 balles.