Question

7.
Fill in the blanks and indicate the property
used in each case :
(a) -15 + 20 = 20 +
(b) - 421 +
= -421
(c) - 4+ (-6 + 8) = [
+ (-6)] + 8
(d) -19+
= 0​

Answer 1

Answer:

sorry I have no answer sorry sorry