Question

А) 52 см+4,7 м- 32,1 дмб) 25,2 м²:7+5,1 дм²-3 м 4 дм²

Answer 1

А)
=5,2дм+47дм-32,1дм=20,1дм
б)
неправильно записано выражение.

Answer 2

25,5м2 : 7 + 5,1дм2 - 3м2 * 4дм2 = 171,6дм2

Там * умножения, а 2 это степень.

Answer 3

To solve the given expressions, let's first convert all the measurements to the same unit. We'll use meters (m) as the common unit.

a) 52 cm + 4.7 m - 32.1 dm

1 cm = 0.01 m (1 centimeter is equal to 0.01 meters) 1 dm = 0.1 m (1 decimeter is equal to 0.1 meters)

52 cm = 52 * 0.01 m = 0.52 m 4.7 m remains as it is (already in meters) 32.1 dm = 32.1 * 0.1 m = 3.21 m

Now, let's solve the expression: 0.52 m + 4.7 m - 3.21 m

Combine like terms: (0.52 + 4.7 - 3.21) m (5.22 - 3.21) m 2.01 m

b) 25.2 m² : 7 + 5.1 dm² - 3 m 4 dm²

First, let's convert all the measurements to square meters (m²).

1 m² = 100 dm² (1 square meter is equal to 100 square decimeters)

25.2 m² remains as it is (already in square meters) 5.1 dm² = 5.1 * (1/100) m² = 0.051 m² 3 m = 3 m² (3 meters squared) 4 dm² = 4 * (1/100) m² = 0.04 m²

Now, let's solve the expression: 25.2 m² : 7 + 0.051 m² - 3 m² + 0.04 m²

Combine like terms: (25.2 + 0.051 + 0.04) m² - 3 m² (25.291) m² - 3 m² 25.291 m² - 3 m² 22.291 m²

So, the simplified expression is 22.291 square meters (m²).