Question

1 2 3 va rog mult repede dau coroana

Answer 1

Ex. 1
a) 20÷2=10
b)20÷4×2=10
c)20÷5×3=12
d)20÷10=2

Ex.2
aflam cati sa vndut in total dimineata si la amiaza
$\frac{2}{6} ^{5} + \frac{2}{5} ^{6} = \frac{10}{30} + \frac{12}{30} = \frac{22}{30}$
300 l ÷30×22=220 litri sau vandut dimineata si la amiaza
Calculam cati litri sau vandut seara:
300-220=80 l
Raspuns: 80 l

Ex.3
aflam cati elevi au primit premii si mentiuni:
$\frac{1}{10} ^{6} + \frac{1}{6} ^{10} + \frac{1}{4} ^{15} = \frac{6}{60}+ \frac{10}{60} + \frac{15}{60}$=$\frac{31}{60}$
60÷60×31=31-elevi au primit premii
60-31=29-elevi ce nu au primit nimic