Question

计算5，6要过程

Answer 1

2-[1-(1/2×2/3-1)]×(-0.75)^2+(-0.5)^3×5^2
=2-[1-(1/3-1)]×9/16-1/8×25
=2-(1+2/3)×9/16-25/8
=2-5/3×9/16-25/8
=2-15/16-25/8
=2-15/16-50/16
=32/16-65/16
=-33/16

追答

(1/2)÷[(-0.5)^3-(-1.5)^2]+1又1/2 ÷(3/4)×(-2)
=(1/2)÷[(-1/8)-(9/4)]-3/2 ×4/3 ×2
=(1/2)÷[(-1-18)÷8]-4
=-(1/2)×(8/19)-4
=-4/19-4
=-4又4/19

Answer 2

建议回书本上看看相关知识点和例题。。。貌似属常规题型。。。