notation scientifique niveau 2 exo 1

1,35 x 10³ x 10^-2 = ?
1. 1,35 x 10¹
2. 1,35
3. 1,35 x 10^-1
4. 1,35 x 10⁵
1,25 x 10^-3 x 10^-2 = ?
1. 1,25 x 10^-5
2. 1,25 x 10⁶
3. 1,25 x 10^-1
4. 1,25 x 10¹
2,35 x 10^-1 x 10² = ?
1. 2,35 x 10¹
2. 2,35 x 10^-1
3. 2,35 x 10²
4. 2,35
8,235 x 10² x 10¹ = ?
1. 8,235 x 10³
2. 8,235 x 10^-1
3. 8,235 x 10¹
4. 8,235
2,35 x 10³ x 10^-1 = ?
1. 2,35 x 10²
2. 2,35 x 10^-3
3. 2,35 x 10^-2
4. 2,35
4,0435 x 10¹ x 10^-2 = ?
1. 4,0435 x 10^-1
2. 4,0435 x 10^-2
3. 4,0435 x 10²
4. 4,0435 x 10¹