Calculs Fractionnaires:

Calculs Fractionnaires: A = 3/7-2/7×21/8  |  B = 5/4-2/3×9/16  |  C = (2+2/3)×(4/5-2/3)  |  D = 1-(1/4+3/4×4/5) Calculs & Puissances: E = -3×(5-3×2)³    |  F = (15-6×3)×(7-6-2×4)² Calculs Fractionnaires: A = 3/7-2/7×21/8 =3/7-42/56 =24/56-42/56 =-18/56 =-9/28 B = 5/4-2/3×9/16  =5/4-18/48 =5/4-9/24 =30/24-9/24 =21/24 =7/8 C = (2+2/3)×(4/5-2/3) =(6/3+2/3)*(12/15-10/15) =8/3*2/15 =16/45 D = 1-(1/4+3/4×4/5) =1-(5/20+12/20) =20/20-17/20 =3/20 Calculs & Puissances: E = -3×(5-3×2)³  =-3*(5-6)² =-3*(-1)² =-3*1 =-3 F = (15-6×3)×(7-6-2×4)² =(15-18)*(1-8)² =-3*(-7)² =-3*49 =-147 A = 3/7-2/7×21/8 [tex] \frac{3}{7} - \frac{2}{7} [/tex] × [tex] \frac{21}{8} [/tex] [tex] \frac{1}{7} [/tex] × [tex] \frac{21}{8} =[/tex] [tex] \frac{21}{56} = \frac{3}{8} [/tex] B = 5/4-2/3×9/16 B =[tex] \frac{5}{4} - \frac{2}{3} [/tex] × [tex] \frac{4}{5} - \frac{2}{3} [/tex] B =[tex] \frac{15}{12} - \frac{8}{12} [/tex] × [tex] \frac{12}{15} - \frac{10}{15} [/tex] B = [tex] \frac{7}{12} [/tex] × [tex] \frac{2}{15} [/tex] B = [tex] \frac{14}{180} [/tex] B = [tex] \frac{7}{90} [/tex] C = (2+2/3)×(4/5-2/3) C = [tex]( \frac{6}{3} + \frac{2}{3} × (\frac{12}{15} - \frac{10}{15}[/tex] C = [tex] \frac{8}{3} [/tex] × [tex] \frac{2}{15} [/tex] C = [tex] \frac{16}{45} [/tex] D = 1-(1/4+3/4×4/5) D = [tex]1 - ( \frac{1}{4} + \frac{3}{4} × \frac{4}{5}) [/tex] D = [tex]1- (1 × \frac{4}{5}) [/tex] D = [tex] \frac{1}{5} [/tex]