Question

$81 \div 9 - 42 \times 5 + {9}^{3} \div {9}^{5} + 6 \times 17$
matemática​

Answer 1

Explicação passo-a-passo:

$81:9-42.5+9^{3}:9^{5}+6.17$

$9-210+9^{3-5}+102$

$9-210+9^{-2}+102$

$9-210+\frac{1}{9^{2}}+102$

$9-210+\frac{1}{81}+102$

m.m.c. é 81

$\frac{9.81}{81}-\frac{210.81}{81}+\frac{1.81}{81}+\frac{102.81}{81}$

$\frac{729-17010+1+8262}{81}=-\frac{8018}{81}$