Răspuns:
Explicație pas cu pas:
[tex]1min=60s \\\\ 1 ora = 60 min = 3600 s\\\\1 kg=1000g \\\\ 1t=1000kg\\ \displaystyle \frac{3}{10} \times 1minut =\frac{3}{10} \times 60^{(10} s = 3 \times 6=18 \\\frac{4}{5} \times 1 h= \frac{4}{5} \times 60^{(5} min = 4 \times 12 = 48 min \\sau =\frac{4}{5} \times 3600^{(5} s= 4 \times 720=2880 s\\ \frac{3}{4} \times 1kg=\frac{3}{4} \times 1000^{(4} g=3x250g=750g\\ \frac{9}{10} \times 1t= \frac{9}{10} \times 1000^{(10} kg=9\times 10[/tex]
[tex]1 m = 100 cm\\\\1 cm = 10 mm\\ \displaystyle \frac{3}{2} \times 1 m= \frac{3}{2} \times 100cm ^{(2}=3 \times 50 = 150 cm\\ \frac{8}{5} \ times 1 cm = \frac{8}{5} \times 1 0 mm^{(5}=8 \times 2= 16 mm[/tex]
[tex]1 secol = 100 ani\\ 1 deceniu = 10 ani\\\displaystyle \frac{3}{100} \times 1 secol = \frac{3}{100} \times 100 ani ^{(100}=3 ani\\\frac{4}{10} \times 1 deceniu = \frac{4}{10} \times 10 ani ^{(10}=4\times 1=4 ani[/tex]
