题目内容
计算:
(1)(﹣3)+(﹣4)﹣(+11)﹣(﹣9);
(2)﹣99
×36(用简便方法计算);
(3)(﹣3)÷(﹣1.75)×0.75×|﹣2.3|÷|﹣3|;
(4)﹣14÷(﹣5)2×(﹣
)+|0.8﹣1|.
(1)(﹣3)+(﹣4)﹣(+11)﹣(﹣9);
(2)﹣99
(3)(﹣3)÷(﹣1.75)×0.75×|﹣2.3|÷|﹣3|;
(4)﹣14÷(﹣5)2×(﹣
解:(1)(﹣3)+(﹣4)﹣(+11)﹣(﹣9)
=﹣7﹣11+9
=﹣9;
(2)﹣99
×36
=
=﹣
=﹣
=﹣3599.5;
(3)(﹣3)÷(﹣1.75)×0.75×|﹣2.3|÷|﹣3|
=
=
=
;
(4)﹣14÷(﹣5)2×(﹣
)+|0.8﹣1|
=1÷25×
+0.2
=
×
+0.2
=
.
=﹣7﹣11+9
=﹣9;
(2)﹣99
=
=﹣
=﹣
=﹣3599.5;
(3)(﹣3)÷(﹣1.75)×0.75×|﹣2.3|÷|﹣3|
=
=
=
(4)﹣14÷(﹣5)2×(﹣
=1÷25×
=
=
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