Question

Determine:

a) o quadrado de sete décimos

b) o cubo de seis décimos

c) a quarta potência de cinco décimos

d) o quadrado de quatro centésimos

 

Determine as potências:

a) (1,5)²

b) (0,9)²

c) (0,8)³

d) (0,45)²

e) (0,05)³

f) (1,1)²

g) (0,2)*4

h) (1,03)²

i) (2,7)²

j) (0,1)*5

l) (6,4)²

m) (0,02)²

Answer 1

$<var>\bigcirc</var>$ 1ª questão

 

$<var>\blacktriangleright a) (\frac{7}{10})^2 = \frac{7^2}{10^2} = \frac{49}{100} = 0,49</var>$

 

$<var>\blacktriangleright b) (\frac{6}{10})^3 = \frac{6^3}{10^3} = \frac{216}{1000} = 0,216</var>$

 

$<var>\blacktriangleright c) (\frac{5}{10})^4 = \frac{5^4}{10^4} = \frac{625}{10000} = 0,0625</var>$

 

$<var>\blacktriangleright d) (\frac{4}{100})^2 = \frac{4^2}{100^2} = \frac{16}{10000} = 0,0016</var>$

 

$<var>\bigcirc</var>$ 2ª questão

 

$<var>\blacktriangleright a) (1,5)^2 = (\frac{15}{10})^2 = \frac{225}{100} = 2,25</var>$

 

$<var>\blacktriangleright b) (0,9)^2 = (\frac{9}{10})^2 = \frac{81}{100} = 0,81</var>$

 

$<var>\blacktriangleright c) (0,8)^3 = (\frac{8}{10})^3 = \frac{512}{1000} = 0,512</var>$

 

$<var>\blacktriangleright d) (0,45)^2 = (\frac{45}{100})^2 = \frac{2025}{10000} = 0,2025</var>$

 

$<var>\blacktriangleright e) (0,05)^3 = (\frac{5}{100})^3 = \frac{125}{1000000} = 0,000125</var>$

 

$<var>\blacktriangleright f) (1,1)^2 = (\frac{11}{10})^2 = \frac{121}{100} = 1,21</var>$

 

$<var>\blacktriangleright g) (0,2)^4 = (\frac{2}{10})^4 = \frac{16}{10000} = 0,0016</var>$

 

$<var>\blacktriangleright h) (1,03)^2 = (\frac{103}{100})^2 = \frac{10609}{10000} = 1,0609</var>$

 

$<var>\blacktriangleright i) (2,7)^2 = (\frac{27}{10})^2 = \frac{729}{100} = 7,29</var>$

 

$<var>\blacktriangleright j) (0,1)^5 = (\frac{1}{10})^5 = \frac{1}{100000} = 0,00001</var>$

 

$<var>\blacktriangleright l) (6,4)^2 = (\frac{64}{10})^2 = \frac{4096}{100} = 40,96</var>$

 

$<var>\blacktriangleright m) (0,02)^2 = (\frac{2}{100})^2 = \frac{4}{10000} = 0,0004</var>$