Salut je suis nulle en maths svp aider moi:Calculer en respectant les priorités et en donnant le résultat sous forme de fraction simplifiée 1) (7/10+5/100)-(8-7

Bonjour,

1) (7/10+5/100)-(8-795/100)

= [(7 x 10) / (10 x 10) + 5/100] - [(8 x 100) / (1 x 100) - 795/100]

= (70/100 + 5/100) - (8/100 - 795/100)

= 75/100 - (- 787/100)

= 75/100 + 787/100

= 862/100

= (2 x 431) / (2 x 50)

= 431/50

2) 1-(1/6+5/12)

= (1 x 12) / (1 x 12) - [(1 x 2) / (6 x 2) + 5/12]

= 12/12 - (2/12 + 5/12)

= 12/12 - 7/12

= 5/12

3) 24/15-[2/3-(11/5-2)]

= (24 x 2) / (15 x 2) - [(2 x 10) / (3 x 10) - ((11 x 6) / (5 x 6) - (2 x 30) / (1 x 30)]

= 48/30 - [20/30 - (66/30 - 60/30)]

= 48/30 - (20/30 - 6/30)

= 48/30 - 14/30

= 34/30

= (2 x 17) / (2 x 15)

= 17/15

4) 5/12+46/5+66/5+52/13+7/12+53/13+68/5+64/13

= 5/12 + 7/12 + 46/5 + 66/5 + 68/5 + 52/13 + 53/13 + 64/13

= 58/12 + 186/5 + 119/13

= (58 x 65) / (12 x 65) + (186 x 156) / (5 x 156) - (119 x 60) / (13 x 60)

= 3770/780 + 29016/780 - 7140/780

= 32786/780 - 7140/780

= 32046/780

= (6 x 5311) / (6 x 130)

= 5311/130.