Question

Frações com Denominadores diferentes ​

Answer 1

2)
3/2+1/4
Mmc (2,4)= 4
= (2.3+1)/4
= (6+1)/4
= 7/4
___________
3)
4/5+1/3
Mmc (3,5)= 15
= (3.4+5)/15
= (12+5)/15
= 17/15
_________
4)
-3/2+1/5
Mmc (2,5)= 10
= (-3.5+2.1)/10
= (-15+2)/10
= - 13/10
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5)
= 8/6 (:2)/(:2) - 4/3
= 4/3-4/3
= 0
________________
6)
-2/3+1/2+2/4(:2)/(:2)
= -2/3+1/2+1/2
= -2/3+2/2
= -2/3+1
= (-2+3)/3
= 1/3

_____________
7)
4/5+3/2-1/3
Mmc (5,2,3)=30
= (6.4+15.3-10)/30
= (24+45-10)/30
= (24+35)/30
= 67/30
_____________

8)
-3/2+1/6+2/3
= (-3.3+1+2.2)/6
= (-9+1+4)/6
= (-9+5)/6
= -4/6 (:2)/(:2)
= -2/3

__________
9)
1/4+2/5.3/2
1/4+2/2.3/5
1/4+3/5
(5+4.3)/20
= (5+12)/20
= 17/12
___________
10)
-3/2+1/3-4/6(:2)/(:2)
-3/2+1/3-2/3
-3/2-1/3
Mmc (2,3)= 6
= (-3.3-2.1)/6
=(-9-2)/6
= -11/6