Prediksi Soal Asesmen Sumatif Akhir Tahun Matematika Kelas 7 Tahun 2025 (Part 1)

Summary

In this video, Om Ali Suud provides Grade 7 students with a detailed guide to prepare for their end-of-year mathematics assessments. The first part covers key topics such as profit and loss, percentages, and basic geometry. Through clear examples, students learn how to calculate profits, determine selling prices, understand discounts, and interpret basic geometric concepts like parallel lines and angles. The video is designed to break down complex problems into simple, digestible steps to ensure students are fully prepared for their exam.

Takeaways

• 😀 The video is focused on discussing predictions for grade 7 mathematics end-of-year assessments.
• 😀 The first part covers questions 1 to 10, with a focus on topics like social arithmetic, profit, and loss.
• 😀 A practical example is given about a bicycle bought for Rp. 2 million and sold for Rp. 1.8 million, resulting in a loss.
• 😀 The video also covers basic profit calculations, including adding a percentage of profit to the purchase price to find the selling price.
• 😀 Example: A clothing store buying clothes for Rp. 60,000 each, adding 25% profit, and selling the items for Rp. 75,000.
• 😀 The video discusses another example where a trader invests Rp. 4,500,000 in a business, making a 20% profit to reach Rp. 5,400,000 in total income.
• 😀 There is also an example of a trader buying mangoes for Rp. 20,000 per kg and selling them with a 30% profit, making the price per kg Rp. 26,000.
• 😀 The video teaches how to calculate discounts, such as a 15% discount on shoes priced at Rp. 360,000, resulting in a new price of Rp. 306,000.
• 😀 Gross, net, and tare weights are discussed, with the correct definitions provided for each term.
• 😀 A practical example is given for tare weight, where the difference between the gross weight (340g) and net weight (315g) results in a tare of 25 grams.

Q & A

What is the first topic discussed in the video?

The first topic discussed in the video is social arithmetic, specifically focusing on profit and loss.

What example is given to explain profit and loss?

The example given is of Ali, who bought a bicycle for Rp. 2,000,000 and sold it for Rp. 1,800,000, resulting in a loss.

How is the loss calculated in the bicycle example?

The loss is calculated by subtracting the selling price (Rp. 1,800,000) from the purchase price (Rp. 2,000,000), resulting in a loss of Rp. 200,000.

What is the selling price of clothes if the store buys them for Rp. 60,000 and wants to make a profit of 25%?

The selling price is Rp. 75,000. The profit is Rp. 15,000, calculated as 25% of Rp. 60,000, and added to the purchase price.

How is the profit for a trader who spends Rp. 4,500,000 and makes a 20% profit calculated?

The profit is Rp. 900,000, calculated as 20% of Rp. 4,500,000. The total income will be Rp. 5,400,000 after adding the profit.

What is the price per kilogram of mangoes after a 30% profit is added to a purchase price of Rp. 20,000 per kilogram?

The price per kilogram of mangoes is Rp. 26,000, calculated by adding a 30% profit of Rp. 6,000 to the purchase price.

How much will a customer pay for shoes priced at Rp. 360,000 with a 15% discount?

The customer will pay Rp. 306,000 after applying the 15% discount, which amounts to a reduction of Rp. 54,000 from the original price.

What is the definition of gross, net, and tare weights as explained in the video?

Gross weight is the total weight of both the packaging and the contents. Net weight is the weight of just the contents, and tare weight is the weight of the packaging.

In the tare weight example with a 340-gram scale reading and a 315-gram net weight, what is the tare weight?

The tare weight is 25 grams, calculated as the difference between the gross weight (340 grams) and the net weight (315 grams).

What type of triangle is described in the final question of the video, based on its angles?

The triangle described is an isosceles triangle with an obtuse angle of 120°, as indicated by the symbols on the image.