## Task 7

The students of grades 1, 2, 3, and 4 of the Karl-Marx-Oberschule have committed to donating 300 marks for solidarity this school year.

Grade 1 donated $48.70 \mathrm{M}$, Grade 2 donated $40.50 \mathrm{M}$, Grade 3 donated $53.20 \mathrm{M}$, and Grade 4 donated $61.80 \mathrm{M}$.

a) How many marks have all 4 classes donated in total?

b) How many marks still need to be donated to fulfill the commitment?
a) All 4 classes donated 204.20 Marks.

b) Another $95.80 \mathrm{M}$ need to be donated.

### 12.11.2 2. Round 1982, Class 3