Question

Calcule o valor de cada expressão:

Answer 1

a) 3/5 - √1/4 = 3/5 - 1/2 = 6- 5/10 = 1/10

b) (-1/2)^2  + √1/16 ∴ 1/4 + 1/4 = 2/4 ∴ 1/2

c) - √16/25  + √1/100 ∴ - 4/5 + 1/10 ∴ -40 + 5 / 50 = - 35/50 = -7/10

Answer 2

a) $\frac{3}{5}- \sqrt{ \frac{1}{4} } = \frac{3}{5}- \frac{1}{2} = \frac{(2*3-5*1)}{10} = \frac{6-5}{10} = \frac{1}{10} = 0,10$

b) $( \frac{-1}{2})^2 + \sqrt{ \frac{1}{16} } = \frac{1}{4} + \frac{1}{4} = \frac{1+1}{4} = \frac{2}{4} = \frac{1}{2} = 0,50$

c) $- \sqrt{ \frac{16}{25}} + \sqrt{ \frac{1}{100} } = -( \frac{4}{5})+ \frac{1}{10} = \frac{-4}{5}+ \frac{1}{10} = \frac{-4*2+1*1}{10} = \frac{-8+1}{10} = \frac{-7}{10}$$= -0,70$