Transforme em decimal:
a) x= 4 + 2/3 - 1 + 3/5
b) y= 0,23 + 7/25 -9/2 - 1/5
c) z= 2/5 - 8/3 + 3/10
d) x= 1/4 . 5/2 - 5/6 : 3/20
e) y= 4/3 . 5/2 - 5/6 : 5/18 +2
me ajudem!!
a) x= 4 + 2/3 - 1 + 3/5
b) y= 0,23 + 7/25 -9/2 - 1/5
c) z= 2/5 - 8/3 + 3/10
d) x= 1/4 . 5/2 - 5/6 : 3/20
e) y= 4/3 . 5/2 - 5/6 : 5/18 +2
me ajudem!!
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Verified answer
a)x = 4 + 2/3 - 1 + 3/5
x = 3 + 2 + 3
----- ----
3 5
x = 15.3 + 5.2 + 3.3
------------------------
15
x = 45 + 10 + 9 = 55 + 9 = 64
----------------- ----------- ------ = 4,26...
15 15 15
64 [ 15
- 60 ---------------
------ 4,266.....
040
- 30
----------
100
- 90
-------------
0100
- 90
----------
0100
- 90
------------
010
***************************************
b)
y = 0,23 + 7/25 - 9/2 - 1/5
y = 0,23 + 0,28 - 4,5 - 0,2
y = 0,51 - 4,70
y = - 4,70 + 0,51
y = - 4,19
70 [ 25
- 50 -------------
------ 0,28
200
- 200
-----------
000
9 [ 2
- 8 ----------
----- 4,5
10
- 10
---------
00
10 [ 5
- 10 ---------
------ 0,2
00
--------------------------------
c)
z = 2/5 - 8/3 + 3/10
z = 2 - 8 + 3
------ ----- -----
5 3 10
6.2 - 10.8 + 3.3
z = -----------------------
30
z = 12 - 80 + 9 = 21 - 80 = 59 = 1,966...
----------------- ------------ ------
30 30 30
z = 1,966....
59 [ 30
- 30 --------------
------ 1,966 ...
290
- 270
----------
0200
- 180
------------
0200
- 180
--------------
0200
- 180
-------------
020
___________________________
Obs.:
mmc (5,3,10) = 30
5,3,10: 2
5,3,5: 3
5,1,5: 5
--------------
1,1,1 = 2.3.5 = 30
****************************************
d)
x = 1/4 . 5/2 - 5/6 : 3/20
x = 1 . 5 - 5 . 20
---- ----- ----- --------
4 2 6 3
x = 5 - 100 (:2)
----- --------
8 18 (:2)
x = 5 - 50
------ -------
8 9
9.5 - 8.50
x = ------------------
72
x = 45 - 400 = - 355 = - 4,930555....
-------------- ---------
72 72
355 [ 72
- 288 ----------------
------- 4,93055...
0670
- 648
-----------
0220
- 216
------------
00400
- 360
-------------
0400
- 360
------------
040
****************************************
e)
y = 4/3 . 5/2 - 5/6 : 5/18 +2
4 . 5 - 5 . 18 + 2
----- ------ ----- ------
3 2 6 5
4 5 - 5 . 18 + 2
----- ------ ------ ------
2 3 5 6
2 . 5 - 1. 3 + 2
-----
3
10 - 3 + 2
-----
3
10 - 1 = 10 - 3 = 7 = 2,33...
------ ----------- -----
3 3 3
7 [ 3
- 6 -----------
----- 2,33
10
- 9
---------
010
- 9
--------
01