Bonjour,
il faut mettre les fractions sous meme denomitateur
71) 482/1000=74/10 + 82/1000. En effet 74*100/10x100+82/1000= 7400/1000+82/1000=7482/1000.
2)740/10+82/1000 = 74,082 : 740x100/10x100+82/1000 = 74000/1000+82/1000 = 74082/1000=74,082
3)2/1000+8/10+74 = 74,802 : 2/1000+ 8x100/1000+74x1000/1x1000=2/1000+800/1000+74000/1000=74802/1000=74,802
4)7x10+482/100=748/10+20/1000 : 7x10x100/100+782/100=7482/100
=748x10/10x100+20/1000 = 74800/1000+20/1000 = 74820/1000=7482/100
