Répondre :
a.
8
745
=
8.745
×
1
0
3
8745=8.745×10
3
b.
0.1425
=
1.425
×
1
0
−
1
0.1425=1.425×10
−1
c.
1
485.6
=
14.856
×
1
0
2
1485.6=14.856×10
2
d.
0.5
=
5
×
1
0
−
1
0.5=5×10
−1
e.
139
=
0.139
×
1
0
3
139=0.139×10
3
f.
72
=
0.00072
×
1
0
5
72=0.00072×
8
745
=
8.745
×
1
0
3
8745=8.745×10
3
b.
0.1425
=
1.425
×
1
0
−
1
0.1425=1.425×10
−1
c.
1
485.6
=
14.856
×
1
0
2
1485.6=14.856×10
2
d.
0.5
=
5
×
1
0
−
1
0.5=5×10
−1
e.
139
=
0.139
×
1
0
3
139=0.139×10
3
f.
72
=
0.00072
×
1
0
5
72=0.00072×