Question

Calcular as expressões, efetuando-se primeiramente entre os parenteses a)(1+1/2)+(2-1/3)= b)(3/2+1/3)-1/2= c)7/4-(1/2+1/6+1/3)=

Answer 1

a) 19/6
1 + 1/2 = 3/2
2 - 1/3 = 5/3
3/2+ 5/3 = 9/6 + 10/6 = 19/6

b) 4/3
3/2 + 1/3 = 9/6 + 2/6 = 11/6
11/6 - 1/2 = 11/6 - 3/6 = 8/6 = 4/3

c) 3/4
1/2 + 1/6 + 1/3 = 3/6 + 1/6 + 2/6 = 6/6 = 1
7/4 - 1 = 7/4 - 4/4 = 3/4

Answer 2

a)(1+1/2)+(2-1/3)= ( 2+1) + ( 6-1) ==> 3 + 5 ==> 9+10 ==> 19
                                   2           3           2    3           6             6
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b)(3/2+1/3)-1/2= ( 9+2) - 1 ==> 11 - 1 ==> 11-3 ==> 8 ou  4
                               6       2         6    2           6           6       3
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c)7/4-(1/2+1/6+1/3)= 7 - ( 3+1+2) ==> 7 - 6 ==> 21-12 ==> 9 ou 3
                                  4          6             4   6           12          12     4