Question

(7/10+1/4+8/40)•(7/2-3/8)•(1-2/3)

Answer 1

7 supra 10+1 supra 4+8 supra 40 x 7 supra 2-3 supra 8 x 1 supra 1-2 supra 3

Numitor comun=10;1;40
10=2x5
1=1
40=2 la puterea 3 x5

n.c=2 la puterea 3 x5=40

7 supra 10 amplific cu 4=28/40
1/4 amplific cu 10=10/40
8/40 amplific cu 1=8/40

n.c=8;2
8=2 la puterea 3
2=2
n.c=2 la puterea 3 x 2
scriu baza si adun exponentii=2 la puterea 4=16

n.c=1;3
n.c=3

28/40+10/40+8/40 x 56/16-6/16x3/3-2/3
46/40x50/16x1/3
46/40 amplific cu 2=23/20
50/16=25/8

23/20x25/8x1/3=575/480