题目内容
计算:
(1)(﹣81)÷2
﹣
÷(﹣2)4;
(2)﹣14+25×
﹣(﹣25)×
+25×(﹣
).
(1)(﹣81)÷2
(2)﹣14+25×
解:(1)原式=﹣81×
﹣
×
=﹣36﹣
=﹣36
;
(2)原式=﹣1+25×
+25×
﹣25×
=﹣1+25×(
+
﹣
)
=﹣1+25
=24.
=﹣36﹣
=﹣36
(2)原式=﹣1+25×
=﹣1+25×(
=﹣1+25
=24.
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