题目内容
计算:
(1)-24+3.2-16-3.5+0.3;
(2)7+(-
)-5-(-0.75);
(3)-6÷(-0.25)×
;
(4)(
)×105;
(5)(-5)2-2×(-3)2;
(6)-14-
×[2-(-3)2]。
(1)-24+3.2-16-3.5+0.3;
(2)7+(-
(3)-6÷(-0.25)×
(4)(
(5)(-5)2-2×(-3)2;
(6)-14-
解:(1)原式=-24-16+3.2+0.3-3.5
=-40+0
=-40;
(2)原式=
=
=2;
(3)原式=
=11;
(4)原式=
=35-75-42
=-82;
(5)原式=25-2×9
=25-18
=7;
(6)原式=
=
=
=
。
=-40+0
=-40;
(2)原式=
=
=2;
(3)原式=
=11;
(4)原式=
=35-75-42
=-82;
(5)原式=25-2×9
=25-18
=7;
(6)原式=
=
=
=
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