Réponses

2014-04-21T20:39:55+02:00
8/2 = 1200/300
1/3 = 100/300
10/100 = 30/300
100/10 = 3000/300
6/6 = 300/300
7/4 = 525/300
12/2 =1800/300
(On as tout mis sur le même dénominateur; on peut maintenant comparer )

10/100<1/3<6/6<7/4<8/2<12/2<100/10


2014-04-21T20:44:11+02:00
Compare les fractions suivantes :

8/2 = 8 x 150 / 2 x 150 = 1200/300
1/3 = 1 x 100 / 3 x 100 = 100/300
10/100 = 10 x 3 / 100 x 3 = 30/300
100/10 = 100 x 30 / 10 x 30 = 3000/300
6/6 = 6 x 50 / 6 x 50 = 300/300
7/4 = 7 x 75 / 4 x 75 = 525/300
12/2
= 12 x 150 / 2 x 150 = 1800/300

30/300 < 100/300 < 300/300 < 525/300 < 1200/300 < 1800/300 < 3000/300
Soit :
10/100 < 1/3 < 6/6 < 7/4 < 8/2 < 12/2 < 100/10