MATEMATIKA | KELAS 4 SD | PENGUKURAN LUAS DENGAN SATUAN BAKU - PERSEGI SATUAN | KURIKULUM MERDEKA

Summary

This video tutorial teaches 4th-grade students about measuring area using standard units of measurement. It begins by reviewing non-standard units like paper money and origami paper and then introduces square units as standard units. The lesson explains how to measure areas using 1 cm² and 1 m² squares, demonstrating the difference between smaller and larger units. The video walks students through activities involving calculating the area of shapes and shows how different shapes can have the same area, reinforcing the concept that area is the same regardless of shape as long as the unit of measurement remains consistent.

Takeaways

• 😀 The video focuses on teaching 4th grade students about measuring area using standard units.
• 😀 It begins by reviewing previous lessons on non-standard units like paper money and origami paper.
• 😀 The lesson introduces square units as a standardized non-baku unit for measuring area.
• 😀 The activity involves cutting two sheets of paper into squares, with one sheet divided into 4 squares and the other into 16 squares.
• 😀 The exercise demonstrates that the size of the square units is different between the two sheets, with the first sheet's squares being larger.
• 😀 Square units with a side length of 1 cm are introduced as a standard unit for measuring area.
• 😀 The area of a square with a side length of 1 cm is calculated as 1 cm², which is the unit of measurement.
• 😀 For larger areas, like a football field, square units with a side length of 1 meter (1 m²) are used.
• 😀 The relationship between centimeters and meters is explained, noting that 1 meter equals 100 centimeters.
• 😀 The lesson concludes with two exercises: one involves calculating areas with square units of 1 cm², and the other challenges students to draw different shapes with an area of 9 cm².

Q & A

What is the main focus of this lesson?

The main focus of this lesson is to teach students how to measure areas using standard units, specifically square units (persegi satuan).

What non-standard units were used in the previous lesson?

In the previous lesson, non-standard units like paper money and origami paper were used to measure area.

What is the significance of dividing the paper into different square units?

Dividing the paper into different square units helps students understand that the size of square units can vary. The first paper was divided into 4 squares, while the second was divided into 16 squares, showing how the size of the square units changes.

What does a 'persegi satuan' represent?

A 'persegi satuan' (square unit) represents a square with each side measuring 1 cm. The area of such a square is 1 cm².

How do we calculate the area of a square with a side of 1 cm?

The area of a square with a side of 1 cm is calculated by multiplying the side length by itself: 1 cm × 1 cm = 1 cm².

What is the area of a square with a side length of 1 meter?

The area of a square with a side length of 1 meter is 1 m², which equals 10,000 cm², because 1 meter = 100 cm.

How do the square units for measuring area in cm² and m² relate to each other?

1 meter is equal to 100 cm, and therefore, 1 m² is equal to 10,000 cm² (since 100 cm × 100 cm = 10,000 cm²).

What does the video suggest is important when measuring areas?

The video suggests that it is important to use standardized units of measurement, such as square units, to accurately measure areas.

Can different shapes have the same area? Provide an example.

Yes, different shapes can have the same area. For example, the video shows that a shape with 9 cm² of area can be represented by various different shapes, not just one specific configuration.

What is the purpose of the hands-on activities involving paper in the lesson?

The hands-on activities involving paper help students visually and practically understand the concept of square units and how to measure area using them, reinforcing the theoretical knowledge.