Question

REZOLVARE: 25%din 500
40%din200
20%din225
5 %din1000
10%din234
50%din286
24%din300
30%din 27
60%din 90
80%din400
va rog repede

Answer 1

25/100×500=25×5=125; 40/100×200=40×2=80; 20/100×225=45; 5/100×1000=50; 10/100×234=23,4; 50/100×286=143; 24/100×300=72; :30/100×27=7,1; 60/100×90=54; 80/100×400=320

Answer 2

$\displaystyle 25 \%~din~500= \frac{25}{100} \cdot 500= \frac{12500}{100} =125 \\ \\ 40 \%~din~200= \frac{40}{100} \cdot 200= \frac{8000}{100} =80 \\ \\ 20 \% ~din~225= \frac{20}{100} \cdot 225= \frac{4500}{100} =45 \\ \\ 5\%~din~1000= \frac{5}{100} \cdot 1000= \frac{5000}{100} =50 \\ \\ 10 \%~din ~234= \frac{10}{100} \cdot 234= \frac{2340}{100} =23,4 \\ \\ 50 \%~din~286= \frac{50}{100}\cdot 286= \frac{14300}{100} =143 \\ \\ 24 \%~din~300= \frac{24}{100} \cdot 300= \frac{7200}{100} =72$

$\displaystyle 30 \%~din~27= \frac{30}{100} \cdot 27= \frac{810}{100} =8,1 \\ \\ 60 \%~din~90= \frac{60}{100} \cdot 90= \frac{5400}{100} =54 \\ \\ 80 \%~din~400= \frac{80}{100} \cdot 400= \frac{32000}{100} =320$