Предмет: Математика, автор: julia834

80 баллов, а задание легкое
На одной ферме 1/3 земли занимает пшеница, 2/5 занимает кукуруза, Остальное не обрабатывается.
1. Какая часть фермы осталась без обработки ?
2. Если ферма занимает 30.000 квадратных метров, сколько квадратных метров используется ?

Ответы

Автор ответа: kforbro
2

1. 1/3 и 2/5 привести к общему знаменателю и сложить — 11/15

2. 22000 м²


yusubovibragim00: разве не 22 000 м2 будет во втором ?
Автор ответа: Аноним
2

ОТВЕТ:1.11/15

2.22000м2

РЕШЕНИЕ:

1.1/3+2/5(находим общ.знаменатель15)

5/15+6/15=11/15

ответ:11/15

2.30000÷3=10000

1/3=10000

30000%5=6000

2/5=12000

10000+12000=22000м2

Ответ:22000м2


julia834: а почему мы 30000 делим на 3?
kforbro: 1/3 и 2/5 приводим к общему знаменателю, получаем 5/15 и 6/15
kforbro: складываем и получаем 11/15
kforbro: потом 30000 умножаем на 11/15 и получаем 22000
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