3/7+5/21= 3*3 +5/21=9/211+5/21=14:7 = 2/3
7*3 21:7
15/8+5/4=15 +5*2 =60/8+ 10/8=70:2 =35/4
8 4*2 8:2
23 - 3 = 23 - 3 * 5 =23 - 115 = 95:5 = 19
100 20 100 20 * 5 100 100 100:5 20
Et tu continue ainsi pour les autres operations.
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3/7+5/21= 3*3 +5/21=9/211+5/21=14:7 = 2/3
7*3 21:7
15/8+5/4=15 +5*2 =60/8+ 10/8=70:2 =35/4
8 4*2 8:2
23 - 3 = 23 - 3 * 5 =23 - 115 = 95:5 = 19
100 20 100 20 * 5 100 100 100:5 20
Et tu continue ainsi pour les autres operations.