Question

90дм 9см-7дм 66мм= 30км 657м-5км 916м= 14т 18ц+15090кг= 19км 380м-10км 876м= 4т 7ц+5т 519кг= 4км 700м+840дм 506см= 19т 423кг-2т 40ц 5кг= 4мес 1сут 15ч+493ч=

Answer 1

90 дм 9 см - 7 дм 66 мм = 83 дм 34 мм = 83 дм 3 см 4 мм
14 т 18 ц + 15090 кг = 29270 кг = 29 т 270 кг
19 км 380 м - 10 км 876 м = 8504 м = 8 км 504 м
4 т 7 ц + 5 т 519 кг =9526 кг = 9 т 526 кг
4 км 700 м + 840 дм 506 см = 478906 см = 47890 дм 6 см = 4789 м 6 см = 4 км 789 м 6 см
19 т 423 кг - 2 т 40 ц 5 кг = 13418 кг = 13 т 4 ц 18 кг
4 мес 1 сут 15 ч + 493 ч = 4 мес 22 сут 4 ч

Answer 2

Let's calculate each expression step by step:

1. 90 dm 9 cm - 7 dm 66 mm: First, we need to convert everything to the same unit. Let's convert the first measurement to centimeters: 90 dm 9 cm = (90 * 10) cm + 9 cm = 900 cm + 9 cm = 909 cm

   Now, let's convert the second measurement to millimeters: 7 dm 66 mm = (7 * 10) dm + 66 mm = 70 dm + 66 mm = 700 mm + 66 mm = 766 mm

   Subtracting the second measurement from the first: 909 cm - 766 mm = 909 cm - 76.6 cm = 832.4 cm

   Therefore, 90 dm 9 cm - 7 dm 66 mm is equal to 832.4 cm.

2. 30 km 657 m - 5 km 916 m: Subtracting the second measurement from the first directly: 30 km 657 m - 5 km 916 m = (30 - 5) km + (657 - 916) m = 25 km - 259 m

   We need to convert the meters to kilometers: 259 m = 259 m / 1000 = 0.259 km

   Subtracting the meters: 25 km - 0.259 km = 24.741 km

   Therefore, 30 km 657 m - 5 km 916 m is equal to 24.741 km.

3. 14 t 18 c + 15090 kg: We need to convert centners (c) to kilograms (kg): 14 t 18 c = 14 t + (18 * 100) kg = 14,000 kg + 1,800 kg = 15,800 kg

   Adding the two weights: 15,800 kg + 15,090 kg = 30,890 kg

   Therefore, 14 t 18 c + 15090 kg is equal to 30,890 kg.

4. 19 km 380 m - 10 km 876 m: Subtracting the second measurement from the first directly: 19 km 380 m - 10 km 876 m = (19 - 10) km + (380 - 876) m = 9 km - 496 m

   We need to convert the meters to kilometers: 496 m = 496 m / 1000 = 0.496 km

   Subtracting the meters: 9 km - 0.496 km = 8.504 km

   Therefore, 19 km 380 m - 10 km 876 m is equal to 8.504 km.

5. 4 t 7 c + 5 t 519 kg: We need to convert centners (c) to kilograms (kg): 4 t 7 c = 4 t + (7 * 100) kg = 4,000 kg + 700 kg = 4,700 kg

   Adding the two weights: 4,700 kg + 5,519 kg = 10,219 kg

   Therefore, 4 t 7 c + 5 t 519 kg is equal to 10,219 kg.

6. 4 km 700 m + 840 dm 506 cm: First, we need to convert decimeters (dm) and centimeters (cm) to meters (m): 840 dm 506 cm = (840 * 0.1) m