Question

efetue:

A) 3/4 - 2/3 x 1/2=
B) 1 1/2 : 3/4 x 3/5=
C) (3/4)² - (1/2)³ =
D) 2 - (3/5+2/3)=
E) 1 : 3/7 : 2/3=

Answer 1

A)3/4 - 2/3 X 1/2
3/4 -2/6 = 9/12 - 4/12 =
5/12
M.M.C(4,,6)=12
B)1 1/2 : 3/4 X 3/5
3/2 : 3/4 X 3/5
3/2 : 9/20
3/2 . 20/9 =
60/18 SIMPLIFICANDO
10/3

c)(3/4)² - (1/2)³
3/4 X 3/4 - 1/2 X 1/2 X 1/2
9/12 - 1/8 =
M.M.C=24
18/24 - 3/24 = 15/24 Simplificando fica 5/8

D)2 - (3/5 + 2/3)
m.m.c =15
2 - (9/15 - 10/15)
2 - (-1/15)
2 + 1/15 
m.m.c =15
30/15 + 1/15 =31/15

E)1: 3/7 : 2/3
1 : 3/7 . 3/2
1 : 9/14
1 . 14/9 =14/9