Question

2м8дм+7м2дм-5м5дм= нужно вычислить

Answer 1

2м8дм+7м2дм-5м5дм=4м5дм

Answer 2

Ответ будет: 4м5дм
Это ведь легко.

Answer 3

I can help you with your math problem. To solve it, you need to add or subtract the meters and the decimeters separately. For example, 2м8дм + 7м2дм = 9м10дм. Here is the detailed solution:

$$ \begin{aligned} 2м8дм + 7м2дм - 5м5дм &= (2м + 7м - 5м) + (8дм + 2дм - 5дм) \\ &= 4м + 5дм \\ &= 4.5 м \end{aligned} $$

The answer is 4.5 meters. You can check your answer by converting all the units to meters and then doing the calculation. For example, 2м8дм = 2.8м. You can find more examples and explanations on how to add and subtract mixed units on these websites: [Uchi.ru](https://uchi.ru/otvety/questions/2m8dm-7m2dm-5m5dm-nuzhno-vichislit), [Математика](https://matematika.my-dict.ru/q/3479604_2m8dm-7m2dm-5m5dm-nuzno-vycislit/), [online-otvet.ru](https://online-otvet.ru/matematika/5cea899d96f4e19a29285b2e). I hope this helps.