计算(1)(-4)-(+8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3)(?9)÷32×23÷(?4)(4)(1?

2025-06-23 09:20:18
推荐回答(1个)
回答1:

(1)原式=-4-8+5-9
=-12+5-9
=-7-9
=-16;

(2)原式=35+30
=65;

(3)原式=(-9)×

2
3
×
2
3
×(-
1
4

=(-6)×
2
3
×(-
1
4

=(-4)×(-
1
4

=1;

(4)原式=1×(-12)-
1
2
×(-12)-
1
3
×(-12)
=-12+6+4
=-2;

(5)原式=3+50÷4×(-
1
5
)-1
=3+50×
1
4
×(-
1
5
)-1
=3+
25
2
×(-
1
5
)-1
=3-
5
2
-1
=-
1
2