Question

Se a= 3×6,5 , b= 0,3×5,1 e c=0,9×0,12, o valor de 10×a - 100×b + 1000×c é =

Answer 1

a =
$3 \times 6.5 = 3 \times \frac{65}{10}$

b =
$0.3 \times 5.1 = \frac{3}{10} \times \frac{51}{10} = \frac{153}{100}$

c=
$0.9 \times 0.12 = \frac{9}{10} \times \frac{12}{100} = \frac{108}{1000}$

10a =
$10 \times \frac{65}{10} = 65$
100b =
$100 \times \frac{153}{100} = 153$

1000c =
$1000 \times \frac{108}{1000} = 108$