800-320:(160-80) и (70+840:70)•(120:40:3)

Question

800-320:(160-80) и (70+840:70)•(120:40:3)

Answer 1

800-320:(160-80)=800-320:80=800-4=796
(70+840:70)*(120:40:3)=(70+12)*(120:40:3)=82*(3:3)=82*1=82

Answer 2

800-320:(160-80)=800-320:80=800-4=796;
(70+840:70)•(120:40:3)=(70+12)×1=82