Write the quantitative relation according to the meaning of the question (1) There were 46 passengers on the train. After arriving at station a, some of them got off. There were 8 passengers coming up. Now there are 50 passengers on the train. How many passengers are going down from station a? (2) The fruit shop shipped 25 cases of apples and 32 cases of pears, weighing 1870 kg. It is known that each case of apples weighs 30 kg. How many kg does each case of pears weigh? (3) The bottom of the triangle is 3 meters and the area is 12 square meters. How high is it? Can you describe it in words? A ship with diesel can use up to 6 hours, when the wind, 30 kilometers per hour. When driving back against the wind, the distance per hour is 80% of the downwind. How far should the ship go before it goes back?

Write the quantitative relation according to the meaning of the question (1) There were 46 passengers on the train. After arriving at station a, some of them got off. There were 8 passengers coming up. Now there are 50 passengers on the train. How many passengers are going down from station a? (2) The fruit shop shipped 25 cases of apples and 32 cases of pears, weighing 1870 kg. It is known that each case of apples weighs 30 kg. How many kg does each case of pears weigh? (3) The bottom of the triangle is 3 meters and the area is 12 square meters. How high is it? Can you describe it in words? A ship with diesel can use up to 6 hours, when the wind, 30 kilometers per hour. When driving back against the wind, the distance per hour is 80% of the downwind. How far should the ship go before it goes back?

When looking for quantitative relationship, you can use the_______ Or_______ To analyze the meaning of the topic

When looking for quantitative relationship, we can use equation or function to analyze the meaning of the problem

1. Xiaohua's height is 5 / 6 of Xiaoli's, () × 5 / 6 = () or () △ () = 5 / 6,
2. The car has driven 7 / 9 of the whole journey, () × 7 / 9 = () or () / () = 7 / 9, 3. 4 / 5 of the number a is equivalent to that of the number B. () × 4 / 5 = () or () / () = 4 / 5, 4. 3 / 4 of the number of boys is equal to that of girls, () × 3 / 4 = () or () / () = 3 / 4

1. Xiaohua's height is 5 / 6 of Xiaoli's, (Xiaoli's height) × 5 / 6 = (Xiaohua's height) or (Xiaohua's height) / (Xiaoli's height) = 5 / 6,
2. The car has traveled 7 / 9 of the whole journey, (the whole journey) × 7 / 9 = (the distance the car has traveled) or (the distance the car has traveled) / (the whole journey) = 7 / 9,
3. 4 / 5 of number a is equal to number B. (number a) × 4 / 5 = (number b) or (number b) / (number a) = 4 / 5,
4. Three fourths of the number of boys is equal to that of girls. (number of boys) × three fourths = (number of girls) or (number of girls) / (number of boys) = three fourths

The bottom of a triangle is x cm, the height is 12 cm, and the area of this triangle is () square cm?

The bottom of a triangle is x centimeters, the height is 12 centimeters, and the area of this triangle is (6x) square centimeters?
S △ = bottom × height △ 2
=x×12÷2
=6x（cm²）
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