Question

Сравни: 7дм²2см²5мм² * 6дм²9см²9мм² 400а * 40000м² 400га * 4км² 30см² * 2дм² 1600дм² * 16м² 4га * 40000м² 5м² * 250000см² 640000см² * 8м²

Answer 1

7дм²2см²5мм²>6дм²9см²9мм²
400а=40000м²
400га=4км²
30см²<2дм²
1600дм²=16м²
4га=40000м²
5м²<250000см²
640000см²>8м²

Answer 2

To compare the given expressions, let's calculate the values of each and then compare them:

1. 7дм²2см²5мм² * 6дм²9см²9мм²: (7 * 10 + 2) * (6 * 10 + 9) * (5 * 0.1 + 9 * 0.01) = 725 * 699 * 0.049 = 25467.675

2. 400а * 40000м²: 400 * 40000 = 16,000,000

3. 400га * 4км²: 400 * 10000 = 4,000,000

4. 30см² * 2дм²: 30 * 0.01 * 2 = 0.6

5. 1600дм² * 16м²: 1600 * 0.01 * 16 = 256

6. 4га * 40000м²: 4 * 10000 = 40,000

7. 5м² * 250000см²: 5 * 250000 * 0.0001 = 12.5

8. 640000см² * 8м²: 640000 * 0.0001 * 8 = 512

Now, let's compare the calculated values:

• 25467.675
• 16,000,000
• 4,000,000
• 0.6
• 256
• 40,000
• 12.5
• 512

Since the values are quite different in magnitude, it's not easy to rank them directly. However, we can see that the second and third expressions are much larger than the rest. The other expressions have values in the order of hundreds or thousands. Therefore, the second expression (400а * 40000м²) is the largest, and the third expression (400га * 4км²) is the second largest among the given expressions. The other expressions are much smaller in comparison.