Question

Помогите сделать тест !№1 Найдите 1,62 от числа 30,5Ответы: а)49,41 б) 49,401 в)49,041 г)49,041№2 Какую часть от числа 640 составляет число 224?Ответы: а)0,35 б)0,38 в)0,4 г)0,45№3 Для окраски стены смешали 3 части синий и 4 части зелёный краски.Сколько взяли синий краски ,если зелёной было взято 300 г ?Ответы :а)225 б)250 в) 320 г)400№4 Известно,что для приготовления фруктово-ореховой смеси на каждые две части орехов берётся три части фруктов .Сколько орехов в 600 г такой смеси ?Ответы :а)200 г б)240 г в)360 г г) 400 г№5 От дома до школы Вася шёл 9 минут. Чтобы затратить на этот путь в 1 ,5 раза меньше времени ,ему нужно ...Ответы :а) увеличить скорость в 1,5 раза. б)Уменьшить скорость в 1,5 раза .в) нельзя точно сказать ,так как неизвестно расстояние от дома до школы .№6 Есть две карты :старая с масштабом 1:1000000 и новая с масштабом 1:2000000 . Расстояние между пунктам А и В на новой карте :Ответы : а)в 2 раза больше ,чем на старой .б) в 5 раз больше ,чем на старой .в)в 5 раз меньше ,чем на старой .г) нельзя точно сказать Помогите полиз )

Answer 1

1) Не знаю!
2) Надо делить: 224:640=0,35---А
3)300:4=75г.
   3*75=225г.-----------А
4)600 : 5(частей всего) * 2 = 240 г орехов----Б
5)Не знаю!

Answer 2

Task 1: Finding 1.62% of 30.5

To find 1.62% of 30.5, you can multiply 30.5 by 0.0162.

The calculation is as follows:

30.5 * 0.0162 = 0.4941

Therefore, the answer is 0.4941.

Task 2: Finding the fraction of 224 in 640

To find the fraction of 224 in 640, you can divide 224 by 640.

The calculation is as follows:

224 / 640 = 0.35

Therefore, the answer is 0.35.

Task 3: Mixing blue and green paint

To determine the amount of blue paint used when 300g of green paint was taken, we need to know the ratio of blue to green paint.

According to the information provided, the ratio is 3 parts blue to 4 parts green.

To calculate the amount of blue paint used, we can set up the following proportion:

3 parts blue / 4 parts green = x grams blue / 300 grams green

Cross-multiplying, we get:

3 * 300 = 4 * x 900 = 4x x = 225

Therefore, 225 grams of blue paint were used.

Task 4: Fruit and nut mixture

To determine the amount of nuts in a 600g fruit and nut mixture, we need to know the ratio of nuts to fruit.

According to the information provided, the ratio is 2 parts nuts to 3 parts fruit.

To calculate the amount of nuts in the mixture, we can set up the following proportion:

2 parts nuts / 3 parts fruit = x grams nuts / 600 grams mixture

Cross-multiplying, we get:

2 * 600 = 3 * x 1200 = 3x x = 400

Therefore, there are 400 grams of nuts in the 600g mixture.

Task 5: Time taken to travel from home to school

To spend 1.5 times less time traveling from home to school, Vasya needs to either increase his speed by 1.5 times or decrease his speed by 1.5 times.

The answer depends on the distance between home and school, which is not provided in the question. Without knowing the distance, we cannot determine the exact solution.

Therefore, the answer is "c) It cannot be determined precisely because the distance from home to school is unknown."

Task 6: Comparison of distances on old and new maps

To compare the distance between points A and B on the old and new maps, we need to consider the scale of each map.

The old map has a scale of 1:1,000,000, which means that 1 unit on the map represents 1,000,000 units in reality.

The new map has a scale of 1:2,000,000, which means that 1 unit on the map represents 2,000,000 units in reality.

To compare the distances, we need to find the ratio of the scales:

1:1,000,000 / 1:2,000,000 = 1/2

Therefore, the distance between points A and B on the new map is 5 times smaller than on the old map.

The answer is "в) 5 times smaller than on the old map".