100 - 110 = -10.
100 minus -80 is 180.
100 - 1-2-3-4-5-6-7-8-9-9-8 => 100-)1+2+3+4+5+6+7+8+9+9+8) 100 - (62) 38 The Answer!!!!
100 minus 110 is -10.
13.00 minus 100 is -87.
Inelegant solution. Maximum effort. 100-1-1-1-1-1-1-1= 99-1-1-1-1-1-1= 98-1-1-1-1-1= 97-1-1-1-1= 96-1-1-1= 95-1-1 94-1= 93 ..... ..... ..... ..... ..... ..... ..... ..... Elegant solution. Minimum effort. 100-1-1-1-1-1-1-1= 100-7= 93
100 minus 393 = -293
Take away 100 and add one...
105
It might be possible to work this in your head. Your 98 is 100 minus 2. This means 98 plus 98 is 100 plus 100 minus 2 minus 2. That's 200 minus 4 which gives 196 as the answer.
100 - 63 = 37
100 - 42 = 58
100 - 66 = 34
9 - 100 = -91
25323 - 100 = 25223
100 - 25 = 75
100 .... wow that is cool!