计算:(1)6-(+3)-(-7)+(-2);(2)-0.5-(-314)+2.75-7;(3)-|-9|×|-123|-(10);(4)-22

计算:(1)6-(+3)-(-7)+(-2);(2)-0.5-(-314)+2.75-7;(3)-|-9|×|-123|-(10);(4)-22×2-3×(-1)2;(5)(23?112?115)÷(?160); (6)-997172×36(用简便方法计算).
2026年09月25日 07:35
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(1)6-(+3)-(-7)+(-2)
=6-3+7-2
=8;

(2)-0.5-(-3

1
4
)+2.75-7
=-0.5+3.25+2.75-7
=(-0.5-7)+(3.25+2.75)
=-7.5+6
=-1.5;

(3)-|-9|×|-1
2
3
|-(10)
=-9×
5
3
-10
=-15-10
=-25;

(4)-22×2-3×(-1)2
=-4×2-3×1
=-8-3
=-11;

(5)(
2
3
?
1
12
?
1
15
)÷(?
1
60
)
 
=(
2
3
?
1
12
?
1
15
)×(-60)
=-40+5+4
=-31;
         
(6)-99
71
72
×36
=(-100+
1
72
)×36
=-3600+
1
2

=-3599
1
2
.