Question

Помогите Выразить десятичную дробь в виде смешанного числа: 72,8; 5,78; 4,012 Решить задачу с помощью уравнения: На приготовление уроков и прогулку у Саши ушло 4,5 часа. На прогулку Саша затратил на 1,68 ч больше, чем на приготовление домашнего задания. Сколько часов Саша потратил на прогулку и выполнения домашнего задания. объясните пожалуйста

Answer 1

72,8=72 8/10=72 4/5
5,78=5 78/100=5 39/50
4,012=4 12/1000=4 3/250

х время на домашнее задание
х+1,68 на прогулку
х+х+1,68=4,5
2х=2,82
х=1,41часа на задание
1,41+1,68=3,09часа на прогулку

Answer 2

Converting Decimal Fractions to Mixed Numbers

To express a decimal fraction as a mixed number, we need to separate the whole number part from the fractional part. Here's how to do it for the given decimal fractions:

1. 72.8: - The whole number part is 72. - The fractional part is 0.8. - To convert the fractional part to a fraction, we write it as 8/10. - Simplifying the fraction, we get 4/5. - Therefore, 72.8 can be expressed as the mixed number 72 4/5.

2. 5.78: - The whole number part is 5. - The fractional part is 0.78. - To convert the fractional part to a fraction, we write it as 78/100. - Simplifying the fraction, we get 39/50. - Therefore, 5.78 can be expressed as the mixed number 5 39/50.

3. 4.012: - The whole number part is 4. - The fractional part is 0.012. - To convert the fractional part to a fraction, we write it as 12/1000. - Simplifying the fraction, we get 3/250. - Therefore, 4.012 can be expressed as the mixed number 4 3/250.

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