Предмет: Математика, автор: skripa498

На 21 детскую простыню требуеца столько же полотна,сколько на 15 простыней для взрослых.Сколько полотна расходуют на 1 простыню для взрослых,если на 1 детскую простыню расходуют 1м.50см. ?

Помогите решить и напишите не только решение но и еше краткую запись.

Ответы

Автор ответа: ilia10
0
21*1.5=31.5 м надо на 21 детскую простынь                                                          31.5:15=2.1 м надо на 1 взрослую простынь
Автор ответа: kristimonro87
0
21д.п-? полотна
15в.п-?полотна
1д.п-1м50см
1в.п-?см
решение
1) 1м50см=150см
2) 150*21=3150(см)-всего на детское полотно
3) 3150:15=210(см)-на 1 взрослое полотно
    210см=2м10см
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