Question

a) 6² - 15 + ( 2³ - 6) c) 24 – (24 : 8 + 2³)


b) 3² + ( 25 : 2² ) . 3 d) 8² - ( 3³ - 3² ) + 8


PRECISO DA CONTA TAMBÉM

Answer 1

a)                                b)  

$6^2-15+\left(2^3-6\right)\\\\=6^2-15+\\\\=6^2-15+2\\\\=36-15+2\\\\=23$       $3^2+\left(25\div \:2^2\right)\cdot \:3\\\\=3^2+\frac{25}{4}\cdot \:3\\\\=9+\frac{25}{4}\cdot \:3\\\\=9+\frac{75}{4}\\\\=\frac{111}{4}\\\\=27\frac{3}{4}$  

c)                                    d)

$24-\left(24\div \:8+2^3\right)\\\\24\div \:8+2^3\\\\=3+8\\\\=11\\\\=24-11\\\\24-11=13\\\\=13$          $8^2-\left(3^3-3^2\right)+8\\\\=8^2-18+8\\\\8^2=64\\\\=64\\\\=64-18+8\\\\64-18=46\\\\=46+8\\\\46+8=54\\\\=54$