1- Resolva estas expressões:
a) Já foi Respondida!
b) 12/13-1/11-3/5
c) 6+1/5-5/4
d) 8+1/2+1/3
Me ajudem!
Anexos:
Soluções para a tarefa
Respondido por
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b) 12/13-1/11-3/5
12 - 1 - 3 55.12 - 65.1 - 143.3
------ ----- ----- = ------------------------------
13 11 5 715
660 - 65 - 429 = 660 - 494 166
--------------------- --------------- = ------------
715 715 715
mmc:
13,11,5: 5
13,11,1: 11
13,1,1: 13
----------------------
1,1,1 = 5.11.13 = 715
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c) 6+1/5-5/4
6 + 1 - 5 20.6 + 4.1 - 5.5 120 + 4 - 25
---- ----- = ----------------------- = -------------------
5 4 20 20
mmc (5,4) = 20
124 - 25 99
------------- = -------
20 20
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d) 8+1/2+1/3
8 + 1 + 1 6.8 + 3.1 + 2.1
----- ----- = -----------------------
2 3 6
mmc (2,3) = 6
= 48 + 3 + 2 = 48 + 5 53
----------------- ----------- = ------
6 6 6
12 - 1 - 3 55.12 - 65.1 - 143.3
------ ----- ----- = ------------------------------
13 11 5 715
660 - 65 - 429 = 660 - 494 166
--------------------- --------------- = ------------
715 715 715
mmc:
13,11,5: 5
13,11,1: 11
13,1,1: 13
----------------------
1,1,1 = 5.11.13 = 715
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c) 6+1/5-5/4
6 + 1 - 5 20.6 + 4.1 - 5.5 120 + 4 - 25
---- ----- = ----------------------- = -------------------
5 4 20 20
mmc (5,4) = 20
124 - 25 99
------------- = -------
20 20
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d) 8+1/2+1/3
8 + 1 + 1 6.8 + 3.1 + 2.1
----- ----- = -----------------------
2 3 6
mmc (2,3) = 6
= 48 + 3 + 2 = 48 + 5 53
----------------- ----------- = ------
6 6 6
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