题目内容
计算:①27﹣13+(﹣4)﹣25
②0.25+(﹣
)﹣
﹣|﹣
|
③
④﹣23+[18﹣(﹣3)×2]÷4
⑤﹣71
×16
⑥
.
②0.25+(﹣
③
④﹣23+[18﹣(﹣3)×2]÷4
⑤﹣71
⑥
解:①27﹣13+(﹣4)﹣25
=27﹣13﹣4﹣25
=﹣15;
②0.25+(﹣
)﹣
﹣|﹣
|
=
﹣
﹣
﹣![]()
=![]()
![]()
![]()
![]()
=﹣1
;
③![]()
=
×(﹣
)﹣
×(﹣
)﹣
×(﹣
)
=﹣2+1![]()
=﹣
;
④﹣23+[18﹣(﹣3)×2]÷4
=﹣8+[18+6]×![]()
=﹣8+24×![]()
=﹣8+6
=﹣2;
⑤﹣71
×16
=(﹣71﹣
)×16
=(﹣71)×16﹣
×16
=﹣1136﹣15
=﹣1151;
⑥![]()
=﹣1×
×(﹣
)+![]()
=
.
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