Răspuns:
Explicație pas cu pas:
a) [tex]\frac{3}{10} * 400 = \frac{3*400}{10} = \frac{3*40}{1} = 120[/tex]
400+120 = 520
b) [tex]\frac{4}{5} * 400 = \frac{4*400}{5} = \frac{3*80}{1} = 240[/tex]
400+240 = 640
c) [tex]\frac{25}{100} * 400 = \frac{25*400}{100} = \frac{25*4}{1} = 100[/tex]
400+100 = 500
d) [tex]\frac{3}{8} * 400 = \frac{3*400}{8} = \frac{3*50}{1} = 150[/tex]
400+150 = 550
e) [tex]\frac{13}{16} * 400 = \frac{13*400}{16} = \frac{3*25}{1} = 75[/tex]
400+75 = 475
