Bonjour,
[tex] {10}^{5} \times {10}^{ - 4} = 10 \times 10 \times 10 \times 10 \times 10 \times \frac{1}{10 {}^{4} } = 10[/tex]
[tex] {10}^{ - 3} \times 10 {}^{2} = 10 \times 10 \times \frac{1}{10 \times 10 \times 10} = \frac{1}{10} = 10 {}^{ - 1} [/tex]
[tex]10 {}^{6} \times 10 { }^{ - 8} \times 10 { }^{3} = 10 {}^{6 - 8 + 3} = 10 {}^{1} = 10[/tex]
