Question

Suma cifrelor numarului 2021*2 la puterea 2021 * 5 la puterea 2020

Answer 1

Răspuns: $\bf Suma~cifrelor~numarului=10$

Explicație pas cu pas:

(*^▽^*) Salutare!

$\bf 2021 \cdot 2^{2021} \cdot 5^{2020} =$

$\bf 2021 \cdot 2^{2020+1} \cdot 5^{2020} =$

$\bf 2021 \cdot 2^{1}\cdot 2^{2020} \cdot 5^{2020} =$

$\bf 2021 \cdot 2\cdot (2 \cdot 5)^{2020} =$

$\bf 4042\cdot 10^{2020} =$

$\bf 4042\cdot 1\underset{\it 2020~de~zerouri}{\underbrace{000............000}}=$

$\bf 4042\underset{\it 2020~de~zerouri}{\underbrace{000............000}}$

$\bf Suma~cifrelor~numarului=4+0+4+2+\underset{\it 2020~de~zerouri}{\underbrace{0+0+.....+0+0}}$

$\boxed{\bf Suma~cifrelor~numarului=10}$

Bafta multa!

#copaceibrainly