(18 x 9) - (19 x 8) = 10
18
-19 - 8 = -27
18
19
-18
Exactly 19 times !... Without the aid of a calculator !
37/8 - 18/8 = 19/8 = 2 and 3/8
-8 -10 = -18
-5 - 13 = -18
(-8) x (-7) - 14 = 42
10x3+8=80-60+? 30+8=20+? 38=20+? 38-20=? 18=? The answer is 18.
10 - 1.8 = 8.2