Respuesta :
you will use kcc (keep change change)
(-18)-(-16) keep -18, change - to +, and change -16 to 16. the new problem is -18+16=-2. so the answer is A.
(-18)-(-16) keep -18, change - to +, and change -16 to 16. the new problem is -18+16=-2. so the answer is A.