Respuesta :

avachriss
10 is in 3, so that's 30. There's another 9.

30 + 9 = 39.

39 tenths.

Answer with explanation:

3.9= 3 ones + 9 Tenths

1 ones =10 Tenths

3 ones =3 × 10 Tenths=30 Tenths

3.9=30  Tenths +9  Tenths

    =39 Tenths

So, 39 Tenth

     [tex]=\frac{39}{10}\\\\=3.9[/tex]

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