Réponse:
B=(3/5-1/2)×5/2
=(3×2-5×1/5×2)×5/2
=(6-5/10)×5/2
=(1/10)×5/2
=1/10×5/2
=5/20
=5:5=1
=20:5=4 donc B=1/4
D=2/3+7/3:21/8
=2+7/3:21/8
=9/3:21/18
=9/3/grande barre 21/8
=9/3×8/21=9×8/21×3=72/63
=72:9=8
=63:9=7
donc D=8/7
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Réponse:
B=(3/5-1/2)×5/2
=(3×2-5×1/5×2)×5/2
=(6-5/10)×5/2
=(1/10)×5/2
=1/10×5/2
=5/20
=5:5=1
=20:5=4 donc B=1/4
D=2/3+7/3:21/8
=2+7/3:21/8
=9/3:21/18
=9/3/grande barre 21/8
=9/3×8/21=9×8/21×3=72/63
=72:9=8
=63:9=7
donc D=8/7