-13又1/2×(1又1/4-2又11/12)÷ (-0.5)÷3/4×4/3-4/3×[(-2)^2-2^2]

问题描述:

-13又1/2×(1又1/4-2又11/12)÷ (-0.5)÷3/4×4/3-4/3×[(-2)^2-2^2]

-13又1/2×(1又1/4-2又11/12)÷ (-0.5)÷3/4×4/3-4/3×[(-2)^2-2^2]
=27/2×(1/4 - 23/12)×2× 4/3 ×4/3 - 4/3×(4-4)
=3×(3/12 - 23/12)×16 - 0
=3×(-20/12)×16
=-20×4
=-80