Calcule o valor das expressões. (Fração).
A)2/5+1/2-1/3
B)3/4x5/6+1/2
C)2/3+1/4x3
D)3/4:1/2-2/3
E)3/5+1/5:1/10
F)2 1/2+3/2x1/2.
Cálculos pfv.
A)2/5+1/2-1/3
B)3/4x5/6+1/2
C)2/3+1/4x3
D)3/4:1/2-2/3
E)3/5+1/5:1/10
F)2 1/2+3/2x1/2.
Cálculos pfv.
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b) 3/4 x 5/6 + 1/2 = (9/12) x (10/12) + 1/2 = 90/144 + 72/144 = 162/144 = 9/8
c) 2/3 + 1/4 x 3 = 2/3 + 3/4 = 8/12 + 9/12 = 17/12
d) 3/4 : 1/2 - 2/3 = 3/4 x 2/1 -2/3 = 6/4 - 2/3 = 18/12 - 8/12 = 10/12 = 5/6
e) 3/5 + 1/5 : 1/10 = 3/5+1/5 x 10/1 = 3/5+10/5 = 18/5
F)2 1/2 + 3/2 x 1/2 = 2 1/2 + 3/4 = 5/2 + 3/4 = 10/4 + 3/4 = 13/4