Question

А)7м 25мм-72,5смб)9км 48м+3,52км-556мв)8см^2 5мм^2•24+680мм^2г)0,02дм^3-2,7см^3:0,25

Answer 1

а) 7 м 25 мм - 72,5 см = 702,5 см - 72,5 см = 630 см
     1 м = 10 см, 1 см = 10 мм, поэтому 7 м 25 мм = 700 см 2,5 см = 702,5 см
б) 9 км 48 м + 3,52 км - 556 м = 9,048 км + 3,52 км - 0,556 км = 12,568 км - 0,556 км = 12,012 км
      1 км = 1000 м
в) 8 см²  5 мм² ·  24 + 680 мм² = 805 мм² · 24 + 680 мм² = 19320 мм² + 680 мм² = 20 000 мм² ²= 200 см² = 2 дм²
г) 0,02 дм³  -2,7 см³  : 0,25 = 20 см³ - 10,8 см³ = 9,2 см³

Answer 2

а) To convert 7m 25mm to centimeters, we first convert 7 meters to centimeters by multiplying by 100:

7 meters * 100 cm/meter = 700 cm

Then we add the 25 mm, which is already in millimeters:

700 cm + 25 mm = 725 mm

So 7m 25mm is equal to 725 cm or 7.25 m.

б) To convert 9 km 48 m to meters, we first convert 3.52 km to meters by multiplying by 1000:

3.52 km * 1000 m/km = 3520 m

Then we add the 9 km and 48 m:

9 km * 1000 m/km + 48 m = 9000 m + 48 m = 9048 m

Finally, we subtract 556 m:

9048 m - 556 m = 8492 m

So 9 km 48 m + 3.52 km - 556 m is equal to 8492 m.

в) To multiply 8 cm² 5 mm² by 24, we first convert 5 mm² to cm² by dividing by 100:

5 mm² / 100 = 0.05 cm²

Then we add the 8 cm²:

8 cm² + 0.05 cm² = 8.05 cm²

Finally, we multiply by 24:

8.05 cm² * 24 = 193.2 cm²

So 8 cm² 5 mm² • 24 is equal to 193.2 cm².

For 680 mm², we can convert it directly to cm² by dividing by 100:

680 mm² / 100 = 6.8 cm²

So we add 6.8 cm² to 193.2 cm²:

193.2 cm² + 6.8 cm² = 200 cm²

So the final result is 200 cm².

г) To divide 0.02 dm³ by 0.25, we first convert 0.02 dm³ to cm³ by multiplying by 1000:

0.02 dm³ * 1000 cm³/dm³ = 20 cm³

Then we divide by 0.25:

20 cm³ / 0.25 = 80 cm³

So 0.02 dm³ - 2.7 cm³ ÷ 0.25 is equal to 80 cm³.