Предмет: Математика, автор: Аноним

Помогите пожалуйста срочно 4 и 5

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Ответы

Автор ответа: МуслимаЮсупова1
0
Курили 5 ручек по цене 6р. и 3 карандаша по цене 4р.
1)6*5=30 (р.)-за 30 р. купили 5 ручек
2)4*3=12 (р.)-за 12р. купили 3 карандаша
3)30+12=42(р.)-стоила покупка
Ответ:42 рубля стоила покупка.


Автор ответа: Анананас
0
4) S = а × в × с.
а = 9 дм. = 90 см.
в = 9 см.
с = 9 м. = 900 см.
S = 729 000 см. = 7290м.
5) Пусть ручки стоили 10, а карандаши 5. Тогда 5 × 10 + 3 × 5= 50 + 15 = 65 рублей стоила вся покупка.
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