题目内容
计算: (1)﹣22+[18﹣(﹣3)×2]÷4;
(2)﹣4﹣[﹣5+(0.2×
﹣1)÷(﹣1
)].
(2)﹣4﹣[﹣5+(0.2×
解:(1)﹣22+[18﹣(﹣3)×2]÷4
=﹣4+[18+6]÷4
=﹣4+6
=2;
(2)﹣4﹣[﹣5+(0.2×
﹣1)÷(﹣1
)]
=﹣4﹣[﹣5+(﹣
)×(﹣
)]
=﹣4﹣(﹣5+
)
=﹣4+4
=
.
=﹣4+[18+6]÷4
=﹣4+6
=2;
(2)﹣4﹣[﹣5+(0.2×
=﹣4﹣[﹣5+(﹣
=﹣4﹣(﹣5+
=﹣4+4
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