课堂探究例2变式训练2-2答案
解:(1)0÷(-1/2)=0
(2)8÷(-16)=-8/16=-1/2
(3)1/4÷(-0.75)
=1/4÷(-3/4)
=1/4×(-4/3)=-1/3
(4)-25÷()
=-25×(-3/5)=15
(5)3/4÷()
=3/4×(-3/4)=-9/16
(6)()÷6
=(-24-6/7)×1/6
=(-24)×1/6-6/7×1/6
=-4-1/7
=
课堂训练第1~2题答案
B;C
课堂训练第3题答案
3;-1/2;3
课堂训练第4题答案
-81/80;-1
课堂训练第5题答案
解:(1)原式=200÷8=25
(2)原式=-(6.5÷0.13)=-50
(3)原式=-1/4÷3/2=-1/4×2/3=-1/6
(4)原式=-8/3÷(-16/9)=8/3×9/16=3/2
课后提升选择题答案
1 | 2 | 3 | 4 | 5 |
D | D | D | B | C |