Question

Descubra a potência de 10 que deve ser colocada no lugar de a para que se obtenha:

a)56,754 x a= 567,540
b)0,003 x a= 30
c)a x 23= 0,000023
d)a x 4,5= 0,00045​

Answer 1

Explicação passo-a-passo:

a) $56,754\times a=567,540$

$a=\dfrac{567,540}{56,754}$

$a=10$

b) $0,003\times a=30$

$a=\dfrac{30}{0,003}$

$a=\dfrac{30000}{3}$

$a=10000$

$a=10^4$

c) $a\times23=0,000023$

$a=\dfrac{0,000023}{23}$

$a=\dfrac{23}{23000000}$

$a=\dfrac{1}{1000000}$

$a=10^{-6}$

d) $a\times4,5=0,00045$

$a=\dfrac{0,00045}{4,5}$

$a=\dfrac{45}{450000}$

$a=\dfrac{1}{10000}$

$a=10^{-4}$