1. (-36)÷(-4)+(-3)
2. (-16)÷[(+7)+(-15)]
3. (-115)+[(-15)X(-5)]
4. (+144)÷(-72)÷[(+56)-(-28)]
5. (-5)÷{[(-72)+(+36)]-(+31)}
要步驟
THX.~~
Maths ..come(10)
2007-10-08 2:48 am
回答 (3)
2007-10-08 3:04 am
1) (-36)÷(-4)+(-3)
=9-3
=6
2) (-16)÷[(+7)+(-15)]
=(-16) / (-8)
= 2
3) (-115)+[(-15)X(-5)]
= (-115) + 75
= -40
4) (+144)÷(-72)÷[(+56)-(-28)]
= (+144)÷(-72)÷84
=-0.02 (corr. to 2 d.p.)
5) (-5)÷{[(-72)+(+36)]-(+31)}
= (-5) / [-36-(+31)]
= (-5) / (-67)
= 0.07 (corr. to 2 d.p.)
=9-3
=6
2) (-16)÷[(+7)+(-15)]
=(-16) / (-8)
= 2
3) (-115)+[(-15)X(-5)]
= (-115) + 75
= -40
4) (+144)÷(-72)÷[(+56)-(-28)]
= (+144)÷(-72)÷84
=-0.02 (corr. to 2 d.p.)
5) (-5)÷{[(-72)+(+36)]-(+31)}
= (-5) / [-36-(+31)]
= (-5) / (-67)
= 0.07 (corr. to 2 d.p.)
2007-10-08 3:02 am
1.(-36)÷(-4)+(-3)
= -36÷-4-3
= 9-3
= 6
2.(-16)÷[(+7)+(-15)]
= -16÷(7-15)
= -16÷-8
= 2
3.(-115)+[(-15)X(-5)]
= -115+75
= -40
4.(+144)÷(-72)÷[(+56)-(-28)]
= -2÷(56+28)
= -2÷84
=-1/42
5.(-5)÷{[(-72)+(+36)]-(+31)}
= -5÷(-36-31)
= 5/67
= -36÷-4-3
= 9-3
= 6
2.(-16)÷[(+7)+(-15)]
= -16÷(7-15)
= -16÷-8
= 2
3.(-115)+[(-15)X(-5)]
= -115+75
= -40
4.(+144)÷(-72)÷[(+56)-(-28)]
= -2÷(56+28)
= -2÷84
=-1/42
5.(-5)÷{[(-72)+(+36)]-(+31)}
= -5÷(-36-31)
= 5/67
2007-10-08 2:57 am
1. (-36)÷(-4)+(-3)
=9+(-3)
=9-3
=6
2.(-16)÷[(+7)+(-15)]
=(-16)÷(-8)
=2
3.(-115)+[(-15)X(-5)]
=(-115)+75
=-40
4.(+144)÷(-72)÷[(+56)-(-28)]
=(-2)÷86
=1/43
5.(-5)÷{[(-72)+(+36)]-(+31)}
=(-5)÷(-36)-31
=-30又36分之31
=9+(-3)
=9-3
=6
2.(-16)÷[(+7)+(-15)]
=(-16)÷(-8)
=2
3.(-115)+[(-15)X(-5)]
=(-115)+75
=-40
4.(+144)÷(-72)÷[(+56)-(-28)]
=(-2)÷86
=1/43
5.(-5)÷{[(-72)+(+36)]-(+31)}
=(-5)÷(-36)-31
=-30又36分之31
收錄日期: 2021-04-23 22:17:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071007000051KK04533