Question

Срочно! Прошу! 1) вычисли. 4 2/5 т - 800 кг 2) приведите дроби к 7/12; 3/16; 9/24 к знаменателю 48. 3) грузоподъемность машины 3 т. Сколько надо сделать поездок, чтобы перевезти 14 1/3 т песка?

Answer 1

1) В 1 тонне 1000 кг, зачит 800/1000=8/10=4/5
$4 \frac{2}{5} - \frac{4}{5}= \frac{22}{5} - \frac{4}{5}= \frac{22-4}{5}= \frac{18}{5} =3 \frac{3}{5} tonnu$
2) 7/12=28/48 (умножаем исходный и знаменатель и числитель на 4)
     3/16=9/48   (.... на 3)
      9/24=18/48 (.... на 2)
3) $14 \frac{1}{3}* \frac{1}{3} = \frac{43}{3} * \frac{1}{3} = \frac{43}{9} =4,7$
значит 5 ходок (он же не может сделать 0,7 ходки)

Answer 2

1
4 2/5т-800кг=4,4т-0,8т=3,6т
2
7/12=28/48 домножаем на 4
3/16=9/48   домножаем на3 
9/24=18/48  домножаем на 2
3
14 1/3:3=43/3*1/3=43/9=5 поездок

Answer 3

Calculations

1) To calculate \(4 \frac{2}{5} \, t - 800 \, kg\), we can first convert \(4 \frac{2}{5}\) to an improper fraction: \[4 \frac{2}{5} = \frac{(4 \times 5) + 2}{5} = \frac{22}{5}\]

Now we can perform the calculation: \[4 \frac{2}{5} \, t - 800 \, kg = \frac{22}{5} \, t - 800 \, kg\]

2) Converting the fractions to have a denominator of 48: - \(7/12\) as \(\frac{7 \times 4}{12 \times 4} = \frac{28}{48}\) - \(3/16\) as \(\frac{3 \times 3}{16 \times 3} = \frac{9}{48}\) - \(9/24\) as \(\frac{9 \times 2}{24 \times 2} = \frac{18}{48}\)

3) To find out how many trips are needed to transport \(14 \frac{1}{3} \, t\) of sand with a car that has a load capacity of \(3 \, t\), we can use the following calculation: \[ \text{Number of trips} = \frac{\text{Total weight of sand}}{\text{Load capacity of the car}} \] \[ \text{Number of trips} = \frac{14 \frac{1}{3} \, t}{3 \, t} \]

Let's calculate these values.