Question

Выполни вычисления. Вырази ответ в более крупных единицах длины. а) 8дм 5см+ 12см 13дм 2см+ 7дм 8см 7дм 4см -9см 30дм-12дм 5см б)12см 2мм +7мм 87см 6мм+25см 4мм 50см 4мм-49см 80см-39см 5мм

Answer 1

А)85+12=97=9дм7см
132+78=210=21дм
74-9=65=6дм 5см
300-125=175=17дм5см
б)122+7=129=12см9мм
876+254=1130=113см
504-490=14=1см4мм
800-395=405=40см5мм

Answer 2

a) To perform the calculations and express the answer in larger units of length, we need to add the given measurements together. Let's convert all the measurements to the same unit before adding them up.

Given measurements: - 8 dm 5 cm - 12 cm - 13 dm 2 cm - 7 dm 8 cm - 7 dm 4 cm - (-9 cm) - 30 dm - 12 dm 5 cm

First, let's convert all the units to cm: - 8 dm 5 cm = (8 * 10 cm) + 5 cm = 85 cm - 12 cm = 12 cm - 13 dm 2 cm = (13 * 10 cm) + 2 cm = 132 cm - 7 dm 8 cm = (7 * 10 cm) + 8 cm = 78 cm - 7 dm 4 cm = (7 * 10 cm) + 4 cm = 74 cm - (-9 cm) = -9 cm - 30 dm = 30 * 10 cm = 300 cm - 12 dm 5 cm = (12 * 10 cm) + 5 cm = 125 cm

Now, let's add all the measurements together: 85 cm + 12 cm + 132 cm + 78 cm + 74 cm - 9 cm + 300 cm + 125 cm = 797 cm

To express the answer in larger units of length, we can convert 797 cm to meters and decimeters.

Converting to meters: 797 cm = 7 m 97 cm

Converting to decimeters: 797 cm = 79 dm 7 cm

Therefore, the answer in larger units of length is: a) 7 m 97 cm or 79 dm 7 cm

b) Similarly, let's perform the calculations and express the answer in larger units of length.

Given measurements: - 12 cm 2 mm - 7 mm - 87 cm 6 mm - 25 cm 4 mm - 50 cm 4 mm - (-49 cm) - 80 cm - 39 cm 5 mm

First, let's convert all the units to mm: - 12 cm 2 mm = (12 * 10 mm) + 2 mm = 122 mm - 7 mm = 7 mm - 87 cm 6 mm = (87 * 10 mm) + 6 mm = 876 mm - 25 cm 4 mm = (25 * 10 mm) + 4 mm = 254 mm - 50 cm 4 mm = (50 * 10 mm) + 4 mm = 504 mm - (-49 cm) = -49 * 10 mm = -490 mm - 80 cm = 80 * 10 mm = 800 mm - 39 cm 5 mm = (39 * 10 mm) + 5 mm = 395 mm

Now, let's add all the measurements together: 122 mm + 7 mm + 876 mm + 254 mm + 504 mm - 490 mm + 800 mm + 395 mm = 2,408 mm

To express the answer in larger units of length, we can convert 2,408 mm to meters and centimeters.

Converting to meters: 2,408 mm = 2 m 408 mm

Converting to centimeters: 2,408 mm = 240 cm 8 mm

Therefore, the answer in larger units of length is: b) 2 m 408 mm or 240 cm 8 mm