Sixth grade ratio, what is the significance of sixth grade ratio

Uncle Li prepared a pesticide in the ratio of 1 gram of liquid medicine and 1500 grams of water.

1) How many grams of water is needed to prepare this pesticide with 50 grams of liquid medicine?

Solution: Set up x grams of water.

1：1500=50：x

1x = 1500 multiplied by 50

x=75000

A: If you use 50 grams of liquid medicine to prepare this pesticide, you need 75,000 grams of water.

2) If you want to prepare 7505 kg of this pesticide, how many kg of liquid medicine is needed?

Think: The ratio of water to liquid medicine is 1500:1, and the total number of servings is 1501.

7505 multiplied by 1501 1 = 5 (grams).

Answer: 5 grams of liquid medicine are required.

If the unit is "kilogram", then it should be:

7505 kg = 7505000 grams.

7,505,000 multiplied by 1,501 1 = 5,000 (grams) 5,000 grams = 5 kilograms.

A: 5 kg of liquid medicine is required.

50*1500=75000 grams.

kg = 750,500 grams.

750500 (1+1500)*1=500g=kg.

It is also possible to directly kilograms.

2.If you need the liquid xg, you need 1500x

x+1500x=750500

x=500

Solution: Set up x grams of water required.

1:1500=50:x

x=50*1500

x=75000

A: Requires water x 75000 grams.

The meaning of proportion in grade 6 is to enable students to understand the meaning of proportion, grasp the basic nature of proportion, and correctly judge whether two ratios can form proportions. It means that two formulas are equal in ratios, and it is called the Sakura case in front of the fierce one. Such as:

The ratio of 4 6 2 3, 6 9 2 3, 4 6 and 6 9 is equal, so 4 6 6 9, this is the ratio.

In proportion, the product of the two outer terms is equal to the product of the two inner terms, which is called the basic property of proportion.

For example, in the case of the branch, the two outer terms are and 3 and their product is and the two inner terms are and 2 and their product is. So. According to the basic nature of proportion, you can find any unknown term in proportion.

There are 240 students in the sixth grade, and the ratio of those who like Chinese to those who do not like Chinese is 5:3. The ratio of those who like mathematics to those who don't like mathematics is 7:5; There are 86 people who like both, and how many people don't like both?

Those who like Chinese are: 240 * 5 (5 + 3) = 150 people, those who like mathematics are: 240 * 7 (7 + 5) = 140 people, both people like both: 86 people.

Then at least one person likes one: 150 + 140-86 = 204 people, that is, two people who don't like both: 240-204 = 36 people.