Question

1)Вычислите 20*(0,8+1,26)+4,5=?2)Размеры прямоугольного балкона 2м10см на 90 см.Сколько нужно квадратных плиток размером 30х30,чтобы выложить пол на балконе?3)Митя со своим братом красили забор на даче.Они поделили работу поровну.Каждому досталось покрасить 18 м .До обеда Митя покрасил девятую часть своего куска,а брат шестую часть своего куска.Кто покарсил больше ? На сколько метров?4)В летний лагерь записались 320 отдызающих.Какое наименьшее число автобусов нужно,чтобы привезти их всех за 1 раз если в один автобус помещается 53 человек.Срочно надо сегодня!!!Спасибо!)

Answer 1

1) 0,8+1,26=2,06
20*2,06=41,2
41,2+4,5=45,7

Answer 2

1) To calculate the expression 20*(0.8+1.26)+4.5, we can follow the order of operations (PEMDAS/BODMAS). First, we perform the addition inside the parentheses: 0.8 + 1.26 = 2.06. Then, we multiply this sum by 20: 20 * 2.06 = 41.2. Finally, we add 4.5 to the result: 41.2 + 4.5 = 45.7. Therefore, the answer is 45.7.

2) To determine the number of square tiles needed to cover the floor of a rectangular balcony, we need to calculate the area of the balcony and divide it by the area of each tile.

The dimensions of the balcony are given as 2m 10cm by 90cm. To convert these measurements to a consistent unit, we can convert centimeters to meters.

2m 10cm is equivalent to 2.1m, and 90cm is equivalent to 0.9m.

The area of the balcony is then calculated by multiplying the length and width: 2.1m * 0.9m = 1.89 square meters.

The size of each tile is given as 30cm by 30cm, which is equivalent to 0.3m by 0.3m.

To find the number of tiles needed, we divide the area of the balcony by the area of each tile: 1.89 square meters / (0.3m * 0.3m) = 21 tiles.

Therefore, 21 square tiles are needed to cover the floor of the balcony.

3) Mitya and his brother were painting a fence on their country house. They divided the work equally, with each person responsible for painting 18 meters. Before lunch, Mitya painted one-ninth of his portion, while his brother painted one-sixth of his portion.

To determine who painted more and by how much, we need to calculate the amount each person painted.

Mitya painted one-ninth of his portion, which is 18 meters / 9 = 2 meters.

His brother painted one-sixth of his portion, which is 18 meters / 6 = 3 meters.

Therefore, Mitya painted 2 meters and his brother painted 3 meters. His brother painted more by 1 meter.

4) In a summer camp, there are 320 participants. Each bus can accommodate 53 people. We need to determine the minimum number of buses required to transport all the participants in one trip.

To calculate the number of buses needed, we divide the total number of participants by the capacity of each bus: 320 participants / 53 people per bus = 6.037 buses.

Since we cannot have a fraction of a bus, we round up to the nearest whole number. Therefore, the minimum number of buses required is 7 buses.

Please note that it is important to consider any additional factors that may affect the transportation logistics, such as the availability of buses and the distance to be traveled.