Question

Efetue as operações abaixo:
a) \frac{1}{4} : \frac{2}{3} + \frac{3}{5} =?

b)  \frac{1}{3} + \frac{2}{5} - 2 =?

c) \frac{1}{ 2^{2} } . 3 + \frac{1}{ 3^{2} } = ?

d) (\frac{1}{ 2 } )^{3} - \sqrt{ \frac{1}{4} } + 3= ?

e)  \sqrt{ \frac{9}{16} } - \frac{1}{4} + \frac{1}{2} ^{3} = ?

f) 2 \frac{1}{2} - 1 \frac{1}{5} + 3 = ?

Answer 1

a
1/4 : 2/3 + 3/5 =
1/4 * 3/2 + 3/5=
3/8 + 3/5 =
mmc = 40
( 15 + 24)/40 = 39/40 ****
b
1/3 + 2/5 - 2/1 =
mmc = 15
( 5 + 6 - 30)/15 = 29/15 ****
c
( 1/2 )² * 3/1 +  ( 1/3)² =
( 1/4) * ( 3/1) + ( 1/9)
3/4 + 1/9 =
mmc = 36
( 27 + 4)/36 = 31/36 ***
d
( 1/2)³  + V(1/4)  + 3/1 =
( 1/8 ) + V(1/2)²  + 3/1 =
1/8 +  1/2 + 3/1 =
mmc = 8
( 1 + 4 + 24)/8 = 29/8 ****
e
V(9/16) - 1/4 +( 1/2)³ 
V(3²/2⁴) - 1/4 + 1/8 =
3/4 - 1/4  + 1/8 =
mmc = 8
( 6 - 2 + 1)/8 =5/8 ****
f
2/(1/2) - 1/ ( 1/5) + 3/1 =
2/1 : 1/2 = 2/1 * 2/1 = 4 ***
1/1 : 1/5 = 1/1 * 5/1 = 5 ***
reescrevendo
4 - 5 + 3 = 2 ***