CALCULE
a) -5/6 + 3/4
b) -1/12 -3/8
c) 7/9 -2/3
d) -2/5 + 2
e) 7/3 - 3
f) -3/10 -1/6
g) -5 • (-2/11)
h) 9/11 • 44/27
i) 4/3 • (-4/3)
j) -0,9 • (-3,5)
k) 0,64 • 10,2
l) 3,2 • (-5/16)
m) 3/4 : 9/2
n) (-1/2) : 1/8
o) 0,5 : 1/3
p) -4 : 1/5
q) 7/6 : 2
r) -1/2 : (-2)
s) 11 : (-44/5)
t) 3,3 : (-11/15)
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Soluções para a tarefa
Resposta:
Explicação passo a passo:
CALCULE:
a) -5/6 + 3/4
Mmc (4,6)= 12
4,6: 2
2,3: 2
1,3: 3
1,1
= 2.2.3
= 12
= (-5.2 + 3.3)/12
= (-10+9)/12
= -1/12
______________
b) - 1/12 - 3/8
Mmc (12,8)= 24
= (-2 - 3.3)/24
= (-2-9)/24
= - 11/24
____________
c) 7/9 - 2/3
Mmc (3,9)= 9
= (7- 3.2)/9
= (7-6)/9
= 1/9
___________
d) - 2/5 + 2
= (-2+5.2)/5
= (-2+10)/5
= 8/5
____________
e) 7/3 - 3
= (7-3.3)/3
= (7-9)/3
= - 2/3
_____________
f) - 3/10 - 1/6
Mmc (6,10)= 30
6,10: 2
3,5: 3
1,5: 5
-----------
1,1
= 2.3.5
= 30
= (- 3.3 - 5)/30
= (-9-5)/30
= - 14/30 (:2)/(:2)
= - 7/15
________________
g) -5 • (-2/11)
= +10/11
______________
h) 9/11 • 44/27
= 44/11 . 9/27 (:9)/(:9)
= 4 . 1/3
= 4/3
_____________
i) 4/3 • (- 4/3)
= - 16/9
_____________
j) -0,9 • (-3,5)
= 0,9 . 3,5
= 9/10 . 35/10 (:5)/(:5)
= 9/10 . 7/2
= 63/20
= 3,15
____________
k) 0,64 • 10,2
= 64/100 (:4)/(:4) . 102/10 (:2)/(:2)
= 16/25 . 51/5
= 816/125
= 6,528
_______________
l) 3,2 • (-5/16)
= - 32/10 . 5/16
= - 32/16 . 5/10 (:5)/(:5)
= - 2 . 1/2
= - 2/2
= - 1
__________
m) 3/4 : 9/2
= 3/4 . 2/9
= 3/9 (:3)/(:3) . 2/4 (:2)/(:2)
= 1/3 . 1/2
= 1/6
____________
n) (-1/2) : 1/8
= - 1/2 . 8
= - 8/2
= - 4
___________
o) 0,5 : 1/3
= 0,5 . 3
= 1,5
__________
p) - 4 : 1/5
= - 4.5
= - 20
____________
q) 7/6 : 2
= 7/6 . 1/2
= 7/12
____________
r) -1/2 : (-2)
= 1/2 . 1/2
= 1/4
______________
s) 11 : (-44/5)
= - 11.5/44 (:11)/(:11)
= - 1.5/4
= - 5/4
______________
t) 3,3 : (-11/15)
= - 33/10 . 15/11
= - 33/11 . 15/10 (:5)/(:5)
= - 3 . 3/2
= - 9/2