Question

12дм2 - 48 см2=? . 2 сут- 30 мин=?. 5 кг -820г=? . 6 кг- 380=?

Answer 1

И 4) 6000-380= 5620грамм ;)

Answer 2

Let's solve each of the expressions step by step:

1. 12 dm^2 - 48 cm^2: To subtract the two areas, we need to convert them to the same unit. Since 1 dm = 10 cm, we can convert the first area from dm^2 to cm^2: 12 dm^2 = 12 * (10 cm)^2 = 12 * 100 cm^2 = 1200 cm^2

Now we can subtract: 1200 cm^2 - 48 cm^2 = 1152 cm^2

2. 2 days - 30 minutes: It seems there might be a mix-up of units here. We can't directly subtract days and minutes. To make it work, we need to convert everything to the same unit. Let's convert days to minutes:

1 day = 24 hours (1 day has 24 hours) 1 hour = 60 minutes

So, 2 days = 2 * 24 hours = 48 hours, and now we can subtract the minutes: 48 hours - 30 minutes = 48 * 60 minutes - 30 minutes = 2880 minutes - 30 minutes = 2850 minutes

3. 5 kg - 820 g: To subtract the masses, we need to convert them to the same unit. Since 1 kg = 1000 g, we can convert the first mass from kg to g: 5 kg = 5 * 1000 g = 5000 g

Now we can subtract: 5000 g - 820 g = 4180 g

4. 6 kg - 380 g: As before, we need to convert the masses to the same unit. 6 kg = 6 * 1000 g = 6000 g:

6000 g - 380 g = 5620 g

So the results are:

1. 12 dm^2 - 48 cm^2 = 1152 cm^2
2. 2 days - 30 minutes = 2850 minutes
3. 5 kg - 820 g = 4180 g
4. 6 kg - 380 g = 5620 g