A-A+
计算:(1)6-(3)-(-7)+(-2);(2)-0.5-(-314)+2.75-7;(3
问题详情
计算:
(1)6-(3)-(-7)+(-2);
(2)-0.5-(-3
(3)-|-9|×|-1
(4)-22×2-3×(-1)2;
(5)(
(6)-99
参考答案
(1)6-(+3)-(-7)+(-2)
=6-3+7-2
=8;
(2)-0.5-(-314)+2.75-7
=-0.5+3.25+2.75-7
=(-0.5-7)+(3.25+2.75)
=-7.5+6
=-1.5;
(3)-|-9|×|-123|-(10)
=-9×53-10
=-15-10
=-25;
(4)-22×2-3×(-1)2
=-4×2-3×1
=-8-3
=-11;
(5)(23-112-115)÷(-160)
=(23-112-115)×(-60)
=-40+5+4
=-31;
(6)-997172×36
=(-100+172)×36
=-3600+12
=-359912.
考点: