5 1/4(12-t)-3 3/4(-t-24) при t= -0.4

Question

5 1/4(12-t)-3 3/4(-t-24) при t= -0.4

Answer 1

5,1/4 (12+0,4)-3×3/4 (0,4-24 )=1,275×12,4-3×3,4 ×-23,6=15,81-3×-80,25=15,81-240,72=256,53