1 ESO - Unit 08 - Exercises 1.8.2 - Proportionality.
- 1. UNIT 08 March 1. In a bag of 200 marbles, 70 are green and the rest are blue. What proportion are green? 2. Are the following magnitudes proportions? Which kind? a) The watermellon´s weight and its price. b) The heigh of a person and its age. c) The book´s price and the number of pages. d) The number of workers unloding a truck and the time they late. e) The aplees´ price and the number of kilos i can buy with the money I have. 3. A couple of kilos of pears cost 1,80 €: a) How much is a kilo? b) How much are 3 kilos? 4. Solve: a) A couple ok kilos of potatoes cost 0,80 €. How much are 5 kilos? Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.2.1
- 2. UNIT 08 March b) A kangaroo moves forward 12 meters with 4 jumps. How many meters will the kangaroo moves with 10 jumps? c) Three loaves of bread weigh 600 grams. How much two loaves of bread weight? d) For renting a bike during 2 hours i have paid 3 €. How much should i pay for renting the bike during 7 hours? 5. Find the value of x: 𝒂𝒂) 𝟏𝟏 𝟑𝟑 = 𝟓𝟓 𝒙𝒙 𝒃𝒃) 𝟔𝟔 𝟗𝟗 = 𝟏𝟏𝟏𝟏 𝒙𝒙 𝒄𝒄) 𝟓𝟓 𝒙𝒙 = 𝟐𝟐 𝟔𝟔 𝒅𝒅) 𝟕𝟕, 𝟓𝟓 𝒙𝒙 = 𝟎𝟎, 𝟓𝟓 𝟎𝟎, 𝟔𝟔 6. A piece of cheese of 400 grams cost 4,60 €. How much will cost a piece of 320 grams? Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.2.2
- 3. UNIT 08 March 7. Four horses eat a sack of feed in 6 days. a) How much time will the sack of feed with 8 horses? b) And with 12 horses? 8. A water tap gives 2 liters per minute and fill up a tank in 15 minutes. How much will late another water tap that gives 5 liters per minute? 9. Marta walks at 4 km/h and she lates 30 minutes to arrive at home. How much will late Pedro on a bike at 15 km/h? Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.2.3
- 4. UNIT 08 March 10. In my classroom we are 26 students and there are 8 that have more than a 7 in Maths. What is the percentage of people bellow 7? 11. A family spends 150 dollars per month for vegetables when the cost of vegetables is 5 dollars per kg. How much amount must the family spend per month, if the cost of vegetables goes up to 5.75 dollars per kg? 12. In a camp, there is food for 5 weeks for 1,200 people. If 400 more people joined the camp, for how many weeks will the food last? Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.2.4