12 because the negative of the negative is positive
10 minus 3 and 2/5 = 7 minus 2/5 = 63/5
18
NO!!!! Here is a table for multiplication/division of 'double (+/-) signs.'. (+)(+) = (+) (+)(-) = (-) (-)(+) = (-) (-)(-) = (+) Sometimes in higher level maths, you can have triple signs. Here is the table. (+)(+)(+) = (+)(+) = (+) (+)(-)(-) = (-)(+) = (-) (-)(+)(+) = (-)(+) = (-) (-)(-)(-) = (+)(-) = (-) It is irrelevant on the position of the 'sign'. NB If no sign is given, then read it as positive (+).
Ans: 2 10 minus 4 times 2 = 10 - (4*2) = 10-8 = 2
8
2/5 = 4/10 minus 1/10 is 3/10
10-(-2)=10+2=12.
10/12 minus 2/4 is 1/3
10 - 12 = -2
It is 21/10 minus 1/10 = 20/10 or 2
It is: 10-2 = 8
10-2 is 0.01