Question

Preciso dos cálculos

Answer 1

a)

20-(-45)÷(-3)²+(-2)×(-1)^8

20-1(-45)÷(-3)(-3)+(-2)(-1)^8

20+45÷9+(-2)(1)

20+45÷9-2

20+5-2

23

b)

1⁴+(-2)⁴-2(-2)⁴+32¹+16×2²

1-(-2)⁴+32+2⁴×2²

1-(16)+32+16+4

1-16+32+16+4

1+32+4

37

c)

(0,5)²÷5-2(0,3×1,2-0,36÷1,2)

0,25÷5-(0,36-0,3)

0,25÷5-0,06

0,05-0,06

-0,01

d)

${2}^{ - 1} + 2 \times ( \frac{2}{3} ) {}^{ - 2} - ( - \frac{1}{3} ) {}^{ - 2} \\ \\ \frac{1}{2} + 2 \times (\frac{3}{2} ) {}^{2} - ( - \frac{ 3}{1} ) {}^{2} \\ \\ \frac{1}{2} + 2 \times \frac{9}{4} - (9) \\ \\ \frac{1}{2} + \frac{18}{4} - 9 \\ \\ \frac{2}{4} + \frac{18}{4} - \frac{28}{4} = - \frac{8}{4} = - 2$

Answer 2

Boa tarde! Segue a resposta e a resolução.

a) $20 - (-45) : (-3)^2 + (-2) . (-1)^8\\20 - 45 : 3^2 + (-2) .1\\20 - \frac{45}{3^2} + (-2)\\ 20 - \frac{45}{9} -2 \\ 20 +5 -2\\23$

b) $1^4 + (-2)^4 - (-2)^4 + 32^1 +16.2^2\\1 + (-2)^4 -(-2)^4 + 32 + 2^4 . 2^2\\1+32+2^4.2^2\\1+32 + 2^6\\1+32+64\\97$

c) $(0,5)^2 : 5 - 2. (0,3 . 1,2 - 0,36 : 1,2)\\\frac{1}{2} ^2 . \frac{1}{5} -2 .(0,36 - 0,3)\\\frac{1}{4}  . \frac{1}{5} - 2 . 0,06\\\frac{1}{20} - 2 . 0,06\\\frac{1}{20} - 0,12\\\frac{1}{20} - \frac{3}{25}  \\\frac{-7}{100}$

d) $2^{-1} + 6 . \frac{2}{3}^{-2} - (-\frac{1}{3}})^{-2} \\\frac{1}{2} +6. (\frac{3}{2})^{2}\\\frac{1}{2} + 6 . \frac{9}{4}  - 9\\\frac{1}{2} + 3. \frac{9}{2}- 9\\\frac{1}{2}+\frac{27}{2} -9\\ 5$