1. 4–(6–12)=?
2. (5–13)–17=?
3. 10–(9+12)=?
4. 0–(–16)+(–8)=?
5. –7–(–4)+(–3)=?
6. 7–(+9)+(–5)=?
7.(+10)+(–5)–(–10)=?
8.(+8)–(–7)+(–9)=?
9.(–5)+(–8)–(+3)=?
10.(–15)+(+35)+(–10)=?
11.(5–7)–(2–6)=?
中一數學(四則運算)
2009-03-19 1:59 am
回答 (6)
2009-03-19 2:39 am
✔ 最佳答案
首先，你要明白一個道理：x-(y-z)=x-y+z
x-(y+z)=x-y-z
1. 4–(6–12)=
=4-6+12
=10
2. (5–13)–17=
=5-13-17
=-25
3. 10–(9+12)=
=10-9-12
=-11
4. 0–(–16)+(–8)=
=0+16-8
=8
5. –7–(–4)+(–3)=
=-7+4-3
=-6
6. 7–(+9)+(–5)=
=7-9-5
=-7
7.(+10)+(–5)–(–10)=
=10-5+10
=15
8.(+8)–(–7)+(–9)=
=8+7-9
=6
9.(–5)+(–8)–(+3)=
=-5-8-3
=-16
10.(–15)+(+35)+(–10)=
=-15+35-10
=10
11.(5–7)–(2–6)=
=-2-2+6
=-2
即是負負得正-(-)= +
正負得負+(-)= -
負正得負-(+)= -
正正得正+(+)= +
2009-03-18 18:40:26 補充：
唔好意思
等11條的答案是2
參考: 自計
2009-03-19 5:47 am
快覽：
1.10
2.-25
3.-11
4.8
5.-6
6.-7
7.15
8.6
9.-16
10.10
11.2
詳細：
1.4-(6-12)
=4-6+12
=10
2.(5-13)-17
=-8-17
=-25
3.10-(9+12)
=10-9-12
=-11
4.0-(-16)+(-8)
=0+16-8
=8
5.-7-(-4)+(-3)
=-7+4-3
=-3-3
=-6
6.7-(+9)+(-5)
=7-9-5
=-7
7.(+10)+(-5)-(-10)
=10-5+10
=15
8.(+8)-(-7)+(-9)
=8+7-9
=15-9
=6
9.(-5)+(-8)-(+3)
=-5-8-3
=-16
10.(-15)+(+35)+(-10)
=-15+35-10
=20-10
=10
11.(5-7)-(2-6)
=5-7-2+6
=-2-2+6
=-4+6
=2
1.10
2.-25
3.-11
4.8
5.-6
6.-7
7.15
8.6
9.-16
10.10
11.2
詳細：
1.4-(6-12)
=4-6+12
=10
2.(5-13)-17
=-8-17
=-25
3.10-(9+12)
=10-9-12
=-11
4.0-(-16)+(-8)
=0+16-8
=8
5.-7-(-4)+(-3)
=-7+4-3
=-3-3
=-6
6.7-(+9)+(-5)
=7-9-5
=-7
7.(+10)+(-5)-(-10)
=10-5+10
=15
8.(+8)-(-7)+(-9)
=8+7-9
=15-9
=6
9.(-5)+(-8)-(+3)
=-5-8-3
=-16
10.(-15)+(+35)+(-10)
=-15+35-10
=20-10
=10
11.(5-7)-(2-6)
=5-7-2+6
=-2-2+6
=-4+6
=2
參考: mE
2009-03-19 2:51 am
1. 4–(6–12)=10
2. (5–13)–17=-25
3. 10–(9+12)=-11
4. 0–(–16)+(–8)=8
5. –7–(–4)+(–3)=-6
6. 7–(+9)+(–5)=-7
7.(+10)+(–5)–(–10)=15
8.(+8)–(–7)+(–9)=6
9.(–5)+(–8)–(+3)=-16
10.(–15)+(+35)+(–10)=10
11.(5–7)–(2–6)=2
2. (5–13)–17=-25
3. 10–(9+12)=-11
4. 0–(–16)+(–8)=8
5. –7–(–4)+(–3)=-6
6. 7–(+9)+(–5)=-7
7.(+10)+(–5)–(–10)=15
8.(+8)–(–7)+(–9)=6
9.(–5)+(–8)–(+3)=-16
10.(–15)+(+35)+(–10)=10
11.(5–7)–(2–6)=2
2009-03-19 2:31 am
1. 10
2. -25
3. -11
4. 8
5. -6
6. -7
7. 15
8. 6
9. -16
10. 10
11. 2
2. -25
3. -11
4. 8
5. -6
6. -7
7. 15
8. 6
9. -16
10. 10
11. 2
2009-03-19 2:25 am
1. 10
2. -25
3. -11
4. 8
5. -6
6. -7
7. 15
8. 6
9. -16
10. 10
11. 2
2. -25
3. -11
4. 8
5. -6
6. -7
7. 15
8. 6
9. -16
10. 10
11. 2
2009-03-19 2:07 am
1. 4–(6–12)=?
=10
2. (5–13)–17=?
=–25
3. 10–(9+12)=?
=–11
4. 0–(–16)+(–8)=?
=8
5. –7–(–4)+(–3)=?
=–6
6. 7–(+9)+(–5)=?
=–5
7.(+10)+(–5)–(–10)=?
=15
8.(+8)–(–7)+(–9)=?
=6
9.(–5)+(–8)–(+3)=?
=–16
10.(–15)+(+35)+(–10)=?
=10
11.(5–7)–(2–6)=?
=2
I hope I can help you
勿抄
=10
2. (5–13)–17=?
=–25
3. 10–(9+12)=?
=–11
4. 0–(–16)+(–8)=?
=8
5. –7–(–4)+(–3)=?
=–6
6. 7–(+9)+(–5)=?
=–5
7.(+10)+(–5)–(–10)=?
=15
8.(+8)–(–7)+(–9)=?
=6
9.(–5)+(–8)–(+3)=?
=–16
10.(–15)+(+35)+(–10)=?
=10
11.(5–7)–(2–6)=?
=2
I hope I can help you
勿抄
參考: me
收錄日期: 2021-04-13 16:30:31
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https://hk.answers.yahoo.com/question/index?qid=20090318000051KK01078