Question

9. [13+(- 12)] + ............) = 13+ [(-12)+(-7)
10. (-4) + [15+(-3)] = [- 4 + 15] +​

Answer 1

Answer:

9. [13+(-12)]+(-7) = 13+[(-12)+(-7)]

10. (-4)+[15+(-3)] = [-4+15]+(-3)