socorro!!!!!!
efetue as operações indicadas:
A)12-27+13-5-64
B)2/3 - 3/4 + 5 - 5/6
C)3/2 - 1 - 8/5 + 3 - 7/10
D)1,3 - 5,2 + 9 - 7,5
E)4,2 - 3/5 + 2,3 + 3/10
F)7,23 - 1,444... - 1/2
G)1,2333... - 3,2333...
H)18: ( - 6 ) + 5 . 3 - 8 . 7 : 14
I)7/3 : 3/4
J) - 3/5 : 4/3 + 5 : ( - 1/4 )
k)(1/2 . 6/5 . 1/3 : 3/10 -1 ) : 1/9
Soluções para a tarefa
Respondido por
11
Socorro!!!!!!
A)12-27+13-5-64
-15 + 8 - 64 =
-7 - 64 = - 71
B)2/3 - 3/4 + 5 - 5/6
mmc 3,4,6|2
2 3 5 3,2,3|2
---- - ----- + 5 - ------ 3,1,3| 3
3 4 6 1,1,1/ = 2x2x3 = 12
4(2) - 3(3) + 12(5) - 2(5)
-----------------------------------
12
8 - 9 + 60 - 10
---------------------
12
8 + 60 -9 - 10
------------------
12
68 - 19 49
----------- = -------------
12 12
C)3/2 - 1 - 8/5 + 3 - 7/10
mmc 2,5,10| 2
3 8 7 1,5, 5| 5
---- - 1 - ----- + 3 - -------- 1,1,1/ = 2x5 = 10
2 5 10
5(3) - 10(1) - 2(8) + 10(3) - 1(7)
-----------------------------------------
10
15 - 10 - 16 + 30 - 7
---------------------------
10
15 + 30 - 10-16 - 7
-------------------------
10
45 - 33 12 12 : 2 6
---------- = ------------ = ------------- = ---------
10 10 10 : 2 5
D)1,3 - 5,2 + 9 - 7,5
1,3 = 13/10
5,2 = 52/10
7,5 = 75/10
13 52 75
----- - ------- + 9 - ------ mmc = 10
10 10 10
1(13) - 1(52) + 10(9) - 1(75)
------------------------------------
10
13 - 52 + 90 - 75
---------------------------
10
13 + 90 - 52 - 75
---------------------------
10
103 - 127 24 24 : 2 12
-------------- = --------- = -------- =--------- ou 2,4
10 10 10 : 2 5
E)4,2 - 3/5 + 2,3 + 3/10
4,2 = 42/10
2,3 = 23/10 mmc 10,5| 2
5,5| 5
1,1/ = 2x5 = 10
42 3 23 3
----- - ----- + ----- + -----
10 5 10 10
1(42) - 2(3) + 1(23) + 1(3)
------------------------------------
10
42 - 6 + 23 + 3
-------------------
10
42 + 23 + 3 - 6
--------------------------
10
68 - 6 66 66 : 2 33
-------- = ---------- = ------------ = --------------
10 10 10 : 2 5
F)7,23 - 1,444... - 1/2
7,23 = 723/100
x = 1,444... ( 10) multiplica
10x = 14,444..,
10x = 14,444...
x = 1,444... subtrai
-------------------------------
9x = 13,000...
9x = 13
x = 13/9
mmc 100,9,2| 2
723 13 1 50,9,1| 2
----- - ----- - ----- 25,9,1|3
100 9 2 25,3.1| 3
25,1,1| 5
5,1,1| 5
1,1,1/ =2x2x3x3x5x5= 900
9(723 )-100(13) - 450(1)
--------------------------------
900
6507 - 1300 - 450
----------------------------
900
6507 - 1750 4757
---------------=----------- = ou 5,28555...
900 900
G)1,2333... - 3,2333...
x = 1,2333... ( 10) mulltiplica
10x = 12,333... ( 10) multiplica
100x = 123,333..
100x = 123,333...
10x = 12,333... ( subtrai)
--------------------------------------
90x = 111,000...
90x = 111
x = 111/90
x = 3,2333... (10)
10x = 32,333... ( 10)
100x = 323,333..
100x = 323,333...
10x = 32,333.. subtrai
------------------------------
90x = 291,0000
90x = 291
x = 291/90
111 291 - 180
----- - --------- = --------- = - 2
90 90 90
H)18: ( - 6 ) + 5 . 3 - 8 . 7 : 14
- 3 + 15 - 56 : 14
12 - 4 = 8
I)7/3 : 3/4
7 3 7 4 7x4 28
--- : ----- = ------x-------= ------- = -------
3 4 3 3 3x3 9
J) - 3/5 : 4/3 + 5 : ( - 1/4 )
3 4 5 1
- --- : ------- + -----: (- ----)
5 3 1 4
3 3 5 4
- ---x----- - ------x------
5 4 1 1
3x3 5x4
- ------ - -------
5x4 1x1
9 20
- ---- - ------- mmc = 20x1 = 20
20 1
- 1(9) - 20(20)
----------------------
20
- 9 - 400 - 409 409
----------- = ------------- = - --------
20 20 20
k)(1/2 . 6/5 . 1/3 : 3/10 -1 ) : 1/9
1 6 1 3 1
(----x----x------ : ------ - 1 ) : -----
2 5 3 10 9
1x6x1 3 1
(--------- : ------ - 1) : ----
2x5x3 10 9
6 3 1
(----- : ------ - 1): -----
30 10 9
6 10 1
(---x------ - 1) : -----
30 3 9
6x10 1
(------- - 1) : ------
30x3 9
60 1
(------ - 1) : -----
90 9
1(60) - 1(90) 1
(-------------------) : --------
90 9
60 - 90 1
---------- : ------
30 9
-30 1
---- : ------
30 9
-30 9
----x----
30 1
-30x9 -270
-------- = -------- = - 9
30x1 30
A)12-27+13-5-64
-15 + 8 - 64 =
-7 - 64 = - 71
B)2/3 - 3/4 + 5 - 5/6
mmc 3,4,6|2
2 3 5 3,2,3|2
---- - ----- + 5 - ------ 3,1,3| 3
3 4 6 1,1,1/ = 2x2x3 = 12
4(2) - 3(3) + 12(5) - 2(5)
-----------------------------------
12
8 - 9 + 60 - 10
---------------------
12
8 + 60 -9 - 10
------------------
12
68 - 19 49
----------- = -------------
12 12
C)3/2 - 1 - 8/5 + 3 - 7/10
mmc 2,5,10| 2
3 8 7 1,5, 5| 5
---- - 1 - ----- + 3 - -------- 1,1,1/ = 2x5 = 10
2 5 10
5(3) - 10(1) - 2(8) + 10(3) - 1(7)
-----------------------------------------
10
15 - 10 - 16 + 30 - 7
---------------------------
10
15 + 30 - 10-16 - 7
-------------------------
10
45 - 33 12 12 : 2 6
---------- = ------------ = ------------- = ---------
10 10 10 : 2 5
D)1,3 - 5,2 + 9 - 7,5
1,3 = 13/10
5,2 = 52/10
7,5 = 75/10
13 52 75
----- - ------- + 9 - ------ mmc = 10
10 10 10
1(13) - 1(52) + 10(9) - 1(75)
------------------------------------
10
13 - 52 + 90 - 75
---------------------------
10
13 + 90 - 52 - 75
---------------------------
10
103 - 127 24 24 : 2 12
-------------- = --------- = -------- =--------- ou 2,4
10 10 10 : 2 5
E)4,2 - 3/5 + 2,3 + 3/10
4,2 = 42/10
2,3 = 23/10 mmc 10,5| 2
5,5| 5
1,1/ = 2x5 = 10
42 3 23 3
----- - ----- + ----- + -----
10 5 10 10
1(42) - 2(3) + 1(23) + 1(3)
------------------------------------
10
42 - 6 + 23 + 3
-------------------
10
42 + 23 + 3 - 6
--------------------------
10
68 - 6 66 66 : 2 33
-------- = ---------- = ------------ = --------------
10 10 10 : 2 5
F)7,23 - 1,444... - 1/2
7,23 = 723/100
x = 1,444... ( 10) multiplica
10x = 14,444..,
10x = 14,444...
x = 1,444... subtrai
-------------------------------
9x = 13,000...
9x = 13
x = 13/9
mmc 100,9,2| 2
723 13 1 50,9,1| 2
----- - ----- - ----- 25,9,1|3
100 9 2 25,3.1| 3
25,1,1| 5
5,1,1| 5
1,1,1/ =2x2x3x3x5x5= 900
9(723 )-100(13) - 450(1)
--------------------------------
900
6507 - 1300 - 450
----------------------------
900
6507 - 1750 4757
---------------=----------- = ou 5,28555...
900 900
G)1,2333... - 3,2333...
x = 1,2333... ( 10) mulltiplica
10x = 12,333... ( 10) multiplica
100x = 123,333..
100x = 123,333...
10x = 12,333... ( subtrai)
--------------------------------------
90x = 111,000...
90x = 111
x = 111/90
x = 3,2333... (10)
10x = 32,333... ( 10)
100x = 323,333..
100x = 323,333...
10x = 32,333.. subtrai
------------------------------
90x = 291,0000
90x = 291
x = 291/90
111 291 - 180
----- - --------- = --------- = - 2
90 90 90
H)18: ( - 6 ) + 5 . 3 - 8 . 7 : 14
- 3 + 15 - 56 : 14
12 - 4 = 8
I)7/3 : 3/4
7 3 7 4 7x4 28
--- : ----- = ------x-------= ------- = -------
3 4 3 3 3x3 9
J) - 3/5 : 4/3 + 5 : ( - 1/4 )
3 4 5 1
- --- : ------- + -----: (- ----)
5 3 1 4
3 3 5 4
- ---x----- - ------x------
5 4 1 1
3x3 5x4
- ------ - -------
5x4 1x1
9 20
- ---- - ------- mmc = 20x1 = 20
20 1
- 1(9) - 20(20)
----------------------
20
- 9 - 400 - 409 409
----------- = ------------- = - --------
20 20 20
k)(1/2 . 6/5 . 1/3 : 3/10 -1 ) : 1/9
1 6 1 3 1
(----x----x------ : ------ - 1 ) : -----
2 5 3 10 9
1x6x1 3 1
(--------- : ------ - 1) : ----
2x5x3 10 9
6 3 1
(----- : ------ - 1): -----
30 10 9
6 10 1
(---x------ - 1) : -----
30 3 9
6x10 1
(------- - 1) : ------
30x3 9
60 1
(------ - 1) : -----
90 9
1(60) - 1(90) 1
(-------------------) : --------
90 9
60 - 90 1
---------- : ------
30 9
-30 1
---- : ------
30 9
-30 9
----x----
30 1
-30x9 -270
-------- = -------- = - 9
30x1 30
isadorapbonilha:
obrigado!!!!
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