Question

1)3,2+1целая 3/5/12целых 4/5-3,2 2)3а 2целых 1/6ч -11 км 3а 3целых 1/2ч- ?км 3)1/3ч со скоростью = 4целых 1/5 км/ч 2/5ч со скоростью = 4целых 3/8 км/ч S-? км

Answer 1

1) 3,2 + 1 целая 3/5=3 целых 2/10+1целая 3/5=4 целые 8/10
12 целых 4/5 -3,2=12 целых 4/5 - 3 целых 2/10=9 целых 6/10

Answer 2

It seems like you've provided a set of mathematical expressions and equations. Let's break down each of them step by step:

1. The first expression appears to be a combination of addition and subtraction involving mixed numbers and decimals:

   • $3.2 + 1$ is $4.2$.
   • $3 \frac{5}{12}$ is $3.416...$.
   • $4 \frac{4}{5} - 3.2$ is $0.8$.

2. The second set of equations is a bit unclear due to the formatting. It seems like you're trying to calculate distances based on given speeds and times. Let's interpret it:

   • The first equation states that traveling at a speed of $3$ and $2/5$ km/h for $1/6$ hour covers a distance of $-11$ km. The negative sign likely indicates direction.
   • The second equation states that traveling at a speed of $3$ and $3/8$ km/h for $3$ and $1/2$ hours needs to be solved to find the distance.

3. In the third set of equations, you're given two time-speed relationships and need to calculate the distance $S$:

   • The first equation relates $1/3$ hour at a speed of $4$ and $1/5$ km/h.
   • The second equation relates $2/5$ hour at a speed of $4$ and $3/8$ km/h.

It seems like you want to solve for distances in the second and third cases. To do that, you'll need to use the formula: distance = speed × time. Here's how you can solve them:

2. For the first equation, let's solve for the distance using the formula: distance = speed × time.

   • Distance = $(-11)$ km (Negative sign indicates direction)
   • Speed = $3 \frac{2}{5}$ km/h = $3.4$ km/h
   • Time = $1/6$ hour
   • Distance = $3.4 \, \text{km/h} \times \frac{1}{6} \, \text{hour} = 0.566...$ km

3. For the second equation, you have two parts with different speeds and times. Calculate the distances for each part and then add them together:

   • Distance = Speed × Time

   • For the first part:

     • Speed = $4 \frac{1}{5}$ km/h = $4.2$ km/h
     • Time = $1/3$ hour
     • Distance = $4.2 \, \text{km/h} \times \frac{1}{3} \, \text{hour} = 1.4$ km

   • For the second part:

     • Speed = $4 \frac{3}{8}$ km/h = $4.375$ km/h
     • Time = $2/5$ hour
     • Distance = $4.375 \, \text{km/h} \times \frac{2}{5} \, \text{hour} = 1.75$ km

   • Total Distance = $1.4$ km + $1.75$ km = $3.15$ km

Please verify if this interpretation aligns with your intentions and let me know if you need further assistance or clarification.