faire les fraction et simpifier 3/21+5/7 ; 17/15-3/5 ; 9/8+5/12 ; 11/15-3/20 ; -2/25+-3/25 ; -9/8-6/4 ; -4/14+-3/21 ; -5/18 - (- 2/27)
Mathématiques
samirouche
Question
faire les fraction et simpifier 3/21+5/7 ; 17/15-3/5 ; 9/8+5/12 ; 11/15-3/20 ; -2/25+-3/25 ; -9/8-6/4 ; -4/14+-3/21 ; -5/18 - (- 2/27)
2 Réponse
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1. Réponse fatisaradahoui
3/21 + 5/7=3/21 + 15/21=18/21
17/15 - 3/5=17/15 - 9/15=8/15
11/15 - 3/20=44/60 - 9/60=35/60=7/12
-2/25 + -3/25=-5/25=-1/5
-9/8 - 6/4=-9/8 - 12/8=21/8 -
2. Réponse telephone16
3/21 +5/7
3/21 +5/7 X 3/3
3/21 +15/21
18/21
17/15 -3/5
17/15 -3/5 X 3/3
17/15 -9/15
8/15
9/8 +5/12
9/8 X 12/12 +5/12 X 8/8
108/96 + 40/96
148/96 = 74/48 = 37/24
11/15 -3/20
11/15 X 4/4 -3/20 X 3/3
44/60 -9/60
35/60 = 7/12
-2/25 -3/25 = -5/25 = -1/5
-9/8 -6/4
-9/8 X 4/4 -6/4 X 8/8
-36/32 -48/32
-84/32 = -42/16 = -21/8
-4/14 -3/21
-4/14 X 21/21 -3/21 X 14/14
-84/294 - 42/294
-126/294 = -42/98 = -21/49 = -3/7
-5/18 -(-2/27)
-5/18 + 2/27
-5/18 X 27/27 +2/27 X 18/18
-135/486 + 36/486
-99/486 = -11/54