⅔×12=8
b. 4/7 z 21 to 4/7×21=12
c. ⅗ z 60 min to ⅗×60=36 min
d. ⅗ z 45 min to ⅗×45=27 min
1.
[tex]a) \ \frac{2}{3} \ liczby \ 12 \ to \ \frac{2}{3}\cdot12 = 2\cdot4 = 8\\\\\\b) \ \frac{4}{7} \ liczby \ 21 \ to \ \frac{4}{7}\cdot21 = 4\cdot3 = 12\\\\\\c) \ \frac{3}{5} \ z \ 60 \ mi \ to \ \frac{3}{5}\cdot60 \ min = 3\cdot12 \ min = 36 \ min\\\\\\d) \ \frac{3}{5} \ z \ 45 \ min \ to \ \frac{3}{5}\cdot45 \ min = 3\cdot7 \ min = 27 \ min[/tex]
