Question

Нойди разность величин : 3 1/4 М - 1 3/5 м; 2) 7 кг - 2 3/10 кг; 3) 8 9/25 км - 2 3/4 км; 4) 6 М - 3 9/20 М; 5) 5 7/12 ч - 2 4/5 ч; 6) 3 2/15 - 1/4 ч.

Answer 1

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Answer 2

1. 3 1/4 М - 1 3/5 м: First, we need to convert 3 1/4 meters to centimeters to make the units match. 3 1/4 М = 325 см (since 1 м = 100 см) Now, we need to convert 1 3/5 meters to centimeters as well. 1 3/5 м = 160 + 3/5 * 100 = 160 + 60 = 220 см So the difference is: 325 см - 220 см = 105 см Therefore, the difference is 1.05 м.

2. 7 кг - 2 3/10 кг: First, we need to convert the fraction 3/10 to a decimal. 3/10 = 0.3 Now we can subtract: 7 кг - 2 3/10 кг = 7 кг - 2.3 кг = 4.7 кг

3. 8 9/25 км - 2 3/4 км: First, we need to convert 2 3/4 km to an improper fraction. 2 3/4 км = 11/4 км Now we can subtract: 8 9/25 км - 2 3/4 км = 8 36/100 км - 11/4 км We need to find a common denominator for 100 and 4, which is 400. So we have: 8 144/400 км - 110/400 км = 8 34/400 км Simplifying, we get: 8.085 км

4. 6 М - 3 9/20 М: First, we need to convert 3 9/20 meters to decimeters to make the units match. 3 9/20 М = 39/2 дм (since 1 м = 10 дм) Now we can subtract: 6 М - 39/2 дм = 60 дм - 39/2 дм = 60 дм - 19.5 дм = 40.5 м

5. 5 7/12 ч - 2 4/5 ч: First, we need to convert 5 7/12 hours to minutes to make the units match. 5 7/12 ч = 5 * 60 + 7 * 5 = 300 + 35 = 335 мин Now we need to convert 2 4/5 hours to minutes as well. 2 4/5 ч = 2 * 60 + 4/5 * 60 = 120 + 48 = 168 мин So the difference is: 335 мин - 168 мин = 167 мин Therefore, the difference is 2 часа 47 минут.

6. 3 2/15 - 1/4 ч: First, we need to convert 1/4 hour to minutes to make the units match. 1/4 ч = 15 мин Now we can subtract: 3 2/15 - 15/15 ч = 3 - 1 ч = 2 ч.