Вопрос школьника по предмету Математика
3ч 47мин= с
12т 4ц 23кг= кг
Даю много баллов
Ответ учителя по предмету Математика
3ч 47 мин= (3*3600 сек )+(47*60 сек)= 10800 сек+2820 сек=13620 сек.
12 т 4 ц 23 кг= (12*1000кг)+(4*100кг)+23кг=12000+400+23=12423кг
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