Numerical aptitude - Calculations

Discover the missing numbers to make the correct mathematical calculations. This tests your mental arithmetic and ability to rearrange sums to solve them.
Numbers may be added, subtracted, multiplied and divided. In sums with multiple steps, brackets will show the order of operators.

Level 1

[1] Sum - [2] Subtraction - [3] Sum - [4] Subtraction - [5] Sum - [6] 6+6 - [7] Subtraction - [8] 3+6 - [9] 11-8 - [10] 3+6+6 - [11] 5+6+1 - [12] 1+4+3 - [13] 3+1 - [14] 5+6+2 -

Level 2

[15] Multiplication - [16] (8+1)x(8-1) - [17] Division - [18] (5+2)x5 - [19] 8x(4-2) - [20] Equation - [21] Equation - [22] (6+2)x(14-5) - [23] Equation - [24] 2x(9-6) - [25] Equation -

Level 3

[26] Equation - [27] (53+32)/5 - [28] Equation - [29] (15+45)/3 -