Question

Efectuați
$2.5 \div 0.5 + 4.2 {}^{2} - 16.9 \div 1.3 + 81 \times 6.5$
​

Answer 1

2,5:0,5+4,2²-16,9:1,3+81•6,5=

=5+17,64-13+526,5=

=536,14