## Task 5

Insert the symbols "+" or "-" into the boxes so that all equations are correct:

$$
\begin{array}{rrrrr} 
& & 14 & \square & 4=18 \\
9 & \square & 10 & \square & 3=16 \\
24 & \square & 10 & \square & 4=10
\end{array}
$$
$14+4=18 ; 9+10-3=16 ; 24-10-4=10$

### 10.23 25th Olympiad 1987

### 10.23.1 1st Round 1987, Class 1