1 steel weight 3 12 kg with a volume of 40 cubic decimeters. What is the volume of this Zhong Gang weighing 1248kg? 3 12:40 = 1248:Xx = 160 2。 Master Wang wants to process a batch of parts. If he processes 80 pieces a day, he can finish the task in five days. If he finishes the task in four days, how many pieces will he need to process every day? This problem is done with knowledge in inverse proportion. 4x=80×5 X= 100 3。 Lay the floor with the same square brick. Paving 18 square meters of ground needs 108 square bricks. How many square bricks do you need if you want to lay a floor of 48 square meters? 108: 18=X:48 X=288 4。 Clothing factory used to make a set of cloth for students, 3.2 meters. After improvement and technology, how many sets can you make now? 3X=3.2× 150 x= 160 5。 This loom can weave 90 meters in three hours. According to this calculation, how many meters can you weave in 7 hours? 90:3 = X； 7 x=2 10

1. The ratio of male workers to female workers is 5︰7. There are four more women than men. How many men and women are there?

2. The ratio of the degrees of the internal angles of a triangle is 2 1 1. What triangle is this according to the angle?

3. The perimeter of a rectangle is 120cm, and the aspect ratio is 1︰4. How many centimeters is the length and width of a rectangle? What is the area?

The ratio of Xiaoming to Xiaohua is 3: 7. If Xiaoming keeps it in 400 yuan again, it will be as much as Xiaohua's. How much money did Xiaoming save?

5. The grain store has rice 125 bags, weighing 5 125 kg. Find the weight of each bag of rice and the ratio of the total weight of rice to the number of rice bags.