题目内容

计算:(1)-5-3.5÷
7
8
×(-
3
4
)

(2)-14-[1-(1-0.5×
1
3
)]×[2-(-3)2]
(1)-5-3.5÷
7
8
×(-
3
4

=-5-
7
2
×
8
7
×(-
3
4

=-5+3
=-2;
(2)-14-[1-(1-0.5×
1
3
)]×[2-(-3)2]
=-1-[1-(1-
1
6
)]×(2-9)
=-1-(1-1+
1
6
)×(-7)
=-1-
1
6
×(-7)
=-1+
7
6

=
1
6
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