Die 12 Tests im Überblick

Test 1

4 + 8 = [_]

Test 2 12 - 4 = [_]
Test 3 8 + [_] = 12
Test 4 12 - [_] = 4
Test 5 12 = 8 + [_]
Test 6 8 · 4 = [_]
Test 7 32 = [_] · 4
Test 8 32 = 8 · [_]
Test 9 32 : 4 = [_]
Test 10 18 + 4 = [_]
Test 11 32 - 8 = [_]
Test 12

17 + [_] = 22