MATHS...

2007-08-09 12:09 am
(+6)+(-10)+(+3) =

(-8)+(+5)-(+3) =

(-12)-(-9)+(-7)=

(-7)-(-10)-(-3)=

(+12)除(+2)

(+18)除(+6)

(-49)除7

(-8) x (-2) +(-3)


(-10)除(+5)-(-4)

(-3) x (+4)+(-2) x (-5)




thz....俾個ANSWERS我呀...THZ...OR 步驟喎...

回答 (3)

2007-08-09 12:18 am
✔ 最佳答案
(+6)+(-10)+(+3)
= 6 - 10 + 3 [正負得負]
= -1

(-8)+(+5)-(+3)
= -8 + 5 - 3 [正負得負]
= 5 - 8 - 3
= -6

(-12)-(-9)+(-7)
= -12 + 9 - 7 [負負得正]
= 9 - 12 - 7
= -10

(-7)-(-10)-(-3)
= -7 + 10 + 3 [負負得正]
=10 + 3 - 7
= 6

(+12)除(+2)
= 12 / 2
= 6

(+18)除(+6)
= 18 / 6
= 3

(-49)除7
= - (49 / 7) [如果係乘除數之中,一個數正、一個負的話,根據正負得負,所以個答案係負]
= -7

(-8) x (-2) +(-3)
= + (8 x 2) + (-3) [乘數果部分負負得正]
= 16 - 3 [正負得負]
= 13

(-10)除(+5)-(-4)
= - (10/5) - (-4) [除數果部分正負得負]
= -2 + 4 [負負得正]

(-3) x (+4)+(-2) x (-5)
= - (3 x 4) + (2 x 5) [先乘除,後加減]
= -12 + 10
= -2
2007-08-09 1:02 am
1)
(+6)+(-10)+(+3)
=6-10+3
=-1
2)
(-8)+(+5)-(+3)
=-8+5-3
=-6
3)
(-12)-(-9)+(-7)
=-12+9-7
=-10
4)
(-7)-(-10)-(-3)
=-7+10+3
=6
5)
(+12)除(+2)
=12÷2
=6
6)
(+18)除(+6)
=18÷6
=3
7)
(-49)除7
=-49÷7
=-7
8)
(-8)x(-2)+(-3)
=8x2-3
=13
9)
(-10)除(+5)-(-4)
=-10÷5+4
=2
10)
(-3)x(+4)+(-2)x(-5)
=-3x4-2x-5
=-3x4+10
=22
2007-08-09 12:18 am
(+6)+(-10)+(+3)
= + 6 - 10 + 3
= -1

(-8)+(+5)-(+3)
= - 8 + 5 - 3
= - 6

(-12)-(-9)+(-7)
= - 12 + 9 - 7
= - 10

(-7)-(-10)-(-3)
= - 7 + 10 +3
= + 6

(+12)除(+2)
= + 6

(+18)除(+6)
= + 3

(-49)除7
= - 7

(-8) x (-2) +(-3)
= + 16 - 3
= +13

(-10)除(+5)-(-4)
= - 2 + 4
= + 2

(-3) x (+4)+(-2) x (-5)
= - 12 + (+ 10)
= - 2
參考: 自己


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