calcule: a-) 5/3 - 7/3 b-) 1/4 +2/3 c-) -4/5 -1/5+2/5 d-) 2/3+1/4-8/6
e-) (2/3) (-1/4)
f-) (-1/5) (-2/7)
g-) (2/3) : (1/5)
h-) (-1/2) : (-4/7)
faça as contas e não só as respostas
Soluções para a tarefa
Respondido por
58
a) 5/3 - 7/3
5 - 7 - 2
------ = -----
3 3
*******************************
b) 1/4 +2/3
1 2 3.1 + 4.2 3 + 8 11
---- + ------ = ------------- = ---------- = --------
4 3 12 12 12
*********************************************
c) -4/5 -1/5+2/5
- 4 - 1 + 2 - 5 + 2 - 3
--------------- = ----------- = -------
5 5 5
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d) 2/3+1/4-8/6
2 1 8 (:2)
------ + ----- - ------
3 4 6 (:2)
2 1 4
----- + ---- - ----
3 4 3
2 - 4 1
------- + -----
3 4
- 2 1 4.(-2) + 3.1 - 8 + 3 - 5
------- + ----- = ---------------- = ----------- = -----------
3 4 12 12 12
**************************************************
e) (2/3) (-1/4)
2 - 1 - 2 (:2) - 1
----- . ----- = ------- = -------
3 4 12 (:2) 6
f) (-1/5) (-2/7)
- 1 - 2 2
------ . ------ = ------
5 7 35
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
g) (2/3) : (1/5)
2 5 10
----- . ----- = --------
3 1 3
*******************************
h) (-1/2) : (-4/7)
- 1 - 7 7
------ . ------ = -------
2 4 8
5 - 7 - 2
------ = -----
3 3
*******************************
b) 1/4 +2/3
1 2 3.1 + 4.2 3 + 8 11
---- + ------ = ------------- = ---------- = --------
4 3 12 12 12
*********************************************
c) -4/5 -1/5+2/5
- 4 - 1 + 2 - 5 + 2 - 3
--------------- = ----------- = -------
5 5 5
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d) 2/3+1/4-8/6
2 1 8 (:2)
------ + ----- - ------
3 4 6 (:2)
2 1 4
----- + ---- - ----
3 4 3
2 - 4 1
------- + -----
3 4
- 2 1 4.(-2) + 3.1 - 8 + 3 - 5
------- + ----- = ---------------- = ----------- = -----------
3 4 12 12 12
**************************************************
e) (2/3) (-1/4)
2 - 1 - 2 (:2) - 1
----- . ----- = ------- = -------
3 4 12 (:2) 6
f) (-1/5) (-2/7)
- 1 - 2 2
------ . ------ = ------
5 7 35
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
g) (2/3) : (1/5)
2 5 10
----- . ----- = --------
3 1 3
*******************************
h) (-1/2) : (-4/7)
- 1 - 7 7
------ . ------ = -------
2 4 8
kelly229:
obrigada
Respondido por
22
Resposta:
obrigado mi ajudo muito
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