Question

Probleme dupa scheme
a) 4...128lei
8...?lei
?...64lei
b) 10...?lei
5...500lei
?...400lei​

Answer 1

Răspuns:

a) 4.......128 lei

8 .......? lei

____________

$\frac{4}{8} = \frac{128}{x} \\ 8 \times 128 = 1024 \\ x = 1024 \div 4 \\ x = 256$

b) 10 ....... ? lei

5 ......... 500 lei

______________

$\frac{10}{5} = \frac{x}{500} \\ x = \frac{10 \times 500}{5} \\ x = \frac{5000}{5} \\ x = 1000 \: lei$

10 ...... 1000 lei

x .......... 400 lei

_____________

$\frac{10}{x} = \frac{1000}{400} \\ x = \frac{10 \times 400}{1000} \\ x = \frac{4000}{1000} \\ x = 4$