Question

Calculati:

1)0,4 + 1 supra 3 × 3 supra 4 =
2)5,45+7 supra 30 : 1 supra 3 =

Answer 1

$1)0.4 + \frac{1}{3} \times \frac{3}{4} = \frac{2}{5} + \frac{1}{4} = \frac{13}{20}$

$2)5.15 + \frac{7}{30} \div \frac{1}{3} = \frac{103}{20} + \frac{7}{30} \times 3 = \frac{103}{20} + \frac{7}{10} = \frac{117}{20}$