Question

1508 запишите обыкновенную дробь в виде десятичной. вычислите.​

Answer 1

1)

$4 \frac{3}{5} \times 1.6 + 2.4 = \frac{23}{5} \times 1.6 + 2.4 = 4.6 \times 1.6 + 2.4 = 7.36 + 2.4 = 9.76$

2)

$5.8 \times 3 \frac{3}{4} - 1 \frac{1}{4} = 5.8 \times \frac{15}{4} - \frac{5}{4} = 5.8 \times 3.75 - 1.25 = 21.75 - 1.25 = 20.5$

3)

$2 \frac{4}{25} + 1.8 \times \frac{3}{10} = \frac{54}{25} + 1.8 \times \frac{3}{10} = 2.16 + 1.8 \times 0.3 = 2.16 + 0.54 = 2.7$