/ =分線
1.
(-48)÷ (-16/15)÷ (+5/4)
2.
(-32)÷(+8/9)x(-1/6)
3.
-9/4+(-2.5)÷(-0.8)
4.
9-[1/2x(-1/4)-(5/8+3/4)]
F1簡單負數乘除法!!
2007-10-02 6:40 am
回答 (2)
2007-10-02 7:31 am
✔ 最佳答案
/=分線1.(-48)÷(-16/15)÷(+5/4)
=(+48)x(+15/16)÷(+5/4)
=(+45)÷(+5/4)
=(+45)x(+4/5)
=36
2.(-32)÷(+8/9)x(-1/6)
=(-32)x(-9/8)x(-1/6)
=(-36)x(-1/6)
=(+36)x(+1/6)
=6
3.(-9/4)+(-2.5)÷(-0.8)
=(-9/4)+(+2.5)x(0.8)
=(-9/4)+2
=(-9/4)+(+8/4) (跳左步)
=(-1/4)
4.9-[1/2x(-1/4)-(5/8+3/4)]
=9-[(-1/2)x(-1/4)-(5/8+3/4)]
=9-[(-1/8)-(5/8+3/4)]
=9-[(-1/8)-(5/8+6/8)]
=9-[(-1/8)-(11/8)]
=9-(-12/8)
=9+12/8
=84/8
2007-10-01 23:32:52 補充：
第四題:答案=10又1/2
參考: 自己
2007-10-02 7:05 am
1.(-48)÷ (-16/15)÷ (+5/4)
=3/15 ÷ 5/4
=3/15x4/5
=12/75
2.(-32)÷(+8/9)x(-1/6)
=(-4/9)x(-1/6)
=4/54
=2/27
3.-9/4+(-2.5)÷(-0.8)
=-9/4+3.125
=-5.875/4
=-1.46875
4.9-[1/2x(-1/4)-(5/8+3/4)]
=9-(-1/8-11/8)
=9-(-12/8)
=9-(-3/2)
=9+3/2
=12/2
=6
=3/15 ÷ 5/4
=3/15x4/5
=12/75
2.(-32)÷(+8/9)x(-1/6)
=(-4/9)x(-1/6)
=4/54
=2/27
3.-9/4+(-2.5)÷(-0.8)
=-9/4+3.125
=-5.875/4
=-1.46875
4.9-[1/2x(-1/4)-(5/8+3/4)]
=9-(-1/8-11/8)
=9-(-12/8)
=9-(-3/2)
=9+3/2
=12/2
=6
收錄日期: 2021-04-13 13:42:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071001000051KK06162