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it means decreasing a number from another no.

the sign is (-)..we call it MINUS

FOR EXAMPLE

10 - 5 = 5

24 - 6 = 18

so we decrease the no. which is after the minus sign with the number before the sign.

Subtraction Of Integers

20-40= -20

why?

because if we subtract 20 from 40 we get 20 so we are right now subtracting 40 from 20 so the answer would be with a minus or negative sign

hope it helps

plz mark as brainliest