Respuesta :
Answer:
Step-by-step explanation:
▶ Sum of -524 and 678
= -524 + 678
= 154
▶ Now , difference of 154 and - 19
= 154 - ( -19)
= 154 + 19
= 173
Put the 2 numbers in to a colom then start to add the two numbers right to left so 6+4 makes 10 then 5+2+ the 1 you carryed over to make 8 then add 5 and 2 to get 7 then add 10,8,7 to get 780