1. (-8)÷(+4分之1)
2. (-16)÷(-4)÷(-2)
3. [1-(3分之2-1又3分1)]÷(-3分1)
4. (-4分7)×[(-5)÷(-16分1)]
5. [4分1-(-8分1)](-2又3分2)
數與代數(五題,急!!!!20點!!!!)QAQ
2013-09-27 2:03 am
回答 (2)
2013-09-27 2:23 am
✔ 最佳答案
1. (-8) ÷ (+ 4分之1)= (-8) ÷ (+ 1/4)
= - (8 ÷ 1/4)
= - 32
2. (-16) ÷ (- 4) ÷ (-2)
= - (16 ÷ 4 ÷ 2)
= - 2
3. [ 1 - (3分之2 - 1又3分1) ] ÷ (-3分1)
= [ 1 - (2/3 - 4/3) ] ÷ (-1/3)
= [ 1 - (-2/3) ] ÷ (-1/3)
= (1 + 2/3) ÷ (-1/3)
= 5/3 ÷ (-1/3)
= - 5
4. (- 4分7) x [ (-5) ÷ (-16分1) ]
= (-7/4) x [ (-5) ÷ (-1/16) ]
= (-7/4) x (+ 5 ÷ 1/16)
= (-7/4) x (+ 80)
= - (7/4 x 80)
= - 140
5. [4分1 - (- 8分1)](-2又3分2)
= [1/4 - (-1/8)] x (- 8/3)
= (1/4 + 1/8) x (- 8/3)
= 3/8 x (- 8/3)
= - 1
2013-09-27 3:43 am
easy
1. (-8) ÷ (+ 4分之1)
= (-8) ÷ (+ 1/4)
= - (8 ÷ 1/4)
= - 32
2. (-16) ÷ (- 4) ÷ (-2)
= - (16 ÷ 4 ÷ 2)
= - 2
3. [ 1 - (3分之2 - 1又3分1) ] ÷ (-3分1)
= [ 1 - (2/3 - 4/3) ] ÷ (-1/3)
= [ 1 - (-2/3) ] ÷ (-1/3)
= (1 + 2/3) ÷ (-1/3)
= 5/3 ÷ (-1/3)
= - 5
4. (- 4分7) x [ (-5) ÷ (-16分1) ]
= (-7/4) x [ (-5) ÷ (-1/16) ]
= (-7/4) x (+ 5 ÷ 1/16)
= (-7/4) x (+ 80)
= - (7/4 x 80)
= - 140
5. [4分1 - (- 8分1)](-2又3分2)
= [1/4 - (-1/8)] x (- 8/3)
= (1/4 + 1/8) x (- 8/3)
= 3/8 x (- 8/3)
= - 1
1. (-8) ÷ (+ 4分之1)
= (-8) ÷ (+ 1/4)
= - (8 ÷ 1/4)
= - 32
2. (-16) ÷ (- 4) ÷ (-2)
= - (16 ÷ 4 ÷ 2)
= - 2
3. [ 1 - (3分之2 - 1又3分1) ] ÷ (-3分1)
= [ 1 - (2/3 - 4/3) ] ÷ (-1/3)
= [ 1 - (-2/3) ] ÷ (-1/3)
= (1 + 2/3) ÷ (-1/3)
= 5/3 ÷ (-1/3)
= - 5
4. (- 4分7) x [ (-5) ÷ (-16分1) ]
= (-7/4) x [ (-5) ÷ (-1/16) ]
= (-7/4) x (+ 5 ÷ 1/16)
= (-7/4) x (+ 80)
= - (7/4 x 80)
= - 140
5. [4分1 - (- 8分1)](-2又3分2)
= [1/4 - (-1/8)] x (- 8/3)
= (1/4 + 1/8) x (- 8/3)
= 3/8 x (- 8/3)
= - 1
參考: me
收錄日期: 2021-04-13 19:43:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130926000051KK00160