Предмет: Математика, автор: anastasiya170990

ДОПОМОЖІТЬ БУДЬ-ЛАСКА !!
ЗАПИШІТЬ БУДЬЛАСКА КОРОТКУ УМОВУ ТА ДІЇ ВИКОНАННЯ ЦІЄЇ ЗАДАЧІ

1.Для фарбування парт витратили 3,6 кг фарби вартістю 4,25 грн. за кілограм, а для фарбування стільців — 2,4 кг фарби вартістю 5,75 грн. За кілограм. Витрати на який з видів фарби були більші та на скільки?

2. Обчисліть у стобчик:

а) 0,2 • 69,4 • 5; в) 4 • 2,5 • 2,26;

б) 3,14 • 0,24 + 3,14 • 0,76; г) 43,8 • 1,4 - 1,4 • 43,5.

3. Спростіть вираз і обчисліть його значення 2,6n - 1,3n + 5,7n - 2,9, якщо n=0,8.

Ответы

Автор ответа: olesazincenko600
1

Ответ:

1.

3,6 кг -— витратили

4,25 грн — стоимость

5,75 — стоимость красок

2. а) 0,2 × 69,4×5 = 13,88×5 = 69,4

4×2,5×2,26 = 10 × 2,26 = 22,6

б) 3,14×0,24+3,14×0,76 = 0.7536+3,14 = 3,8936×0,76=2,959136


olesazincenko600: поставь пожалуйста лучший ответ, а то пройти до сл статуса не могу...
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