数学有理数计算题

问题描述:

数学有理数计算题
1.1/2÷[(-0.5)³-(-1.5)²]+1又1/2÷3/4×(-2)
2.2×(-1/2)³-3×(-1/2)²+3×(-1/2)-1

1.=1/2÷(-0.125-2.25)+3/2×4/3×(-2)
=1/2÷(-2.125)+2×(-2)
=1/2÷17/8-4
=8/34-4
=-128/34
2.=2×(-1/8)-3×1/4-3/2-1
=-1/4-3/4-3/2-1
=-1-1.5-1
=-3.5