Respostas

2014-04-25T20:26:14-03:00
A)  \sqrt{1000: (2x5)} =  \sqrt{1000: (10)} =  \sqrt{100} = 10
b)  \sqrt{7-(2x3} =  \sqrt{7-(6)} =  \sqrt{1} = 1
c) (7-2)x3 = (5)x3= 15
d)  6^{2} -  \sqrt{36} = 36 - 6 = 30