Предмет: Математика, автор: вики2010

реши удобным способом

Приложения:

Ответы

Автор ответа: krnl

1) (38+2)+(45+5)=40+50=90
2) (27+3) + (14+6)=30+20=50
3) (17+3) + (34+6)=20+40=60
4) (25+5) + (42+8)=30+50=80

Автор ответа: gery236

45+38+5+2=(45+5)+(38+2)=50+40=90
6+27+14+3=(6+14)+(3+27)=20+30=50
17+6+34+3=(17+3)+(6+34)=20+40=60
25+8+5+42=(25+5)+(42+8)=30+50=80

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: morozovav2006

Помогите, пожалуйста! Желательно срочно
Задание: поставте слова в нужной форме в текста.

А) Thomas Jefferson, thr principal author of the 1.___ of 2.___ became the third president of the US in 1801. Although he had 3.___s to limit the president's power, 4.___ realities dictated orherwise. Among other 5.___ actions, in 1803 he purchased the last Louisiana Territory from France and extended the country's borders as far west as the 6.___ Mountains. The frontier of 7.___s moved west. The young nation was full of 8.___ and energy, but there were 9.___s too. The ringing words of the 10.___ \"all men are created equal\", were 11.___ for 1,5 mallion slaves. In 1820 12.___ and 13.___ politicians debated the question of whether 14.___ would be abolished.

Слова: Declare, dependence, intend, politics, force, rock, settle, optimistic, contradict, declare, meaning, south, north, slave.

B) President Kennedy worked long hours. He usually 1.___ up at seven and 2.___ to bed until eleven or twelve at night, or 3.___. He read six newspapers while he 4.___ breakfast, had meetings with important people who 5.___ to see 6.___. Throughout the day he read reports from 7.___ advisors. He wanted 8.___ sure he made the 9.___ decisions for his country. He 10.___ the US as a country 11.___ forward into the future with new discoveries in science and improvement in education and other fields. He 12.___ democracy and freedom for the whole words.

Слова: get, not go, late, eat, invite, he, he, be, good, see, move, want.

5 лет назад

Предмет: Биология, автор: hahahsjaksn

3. Оцените необходимость сбалансированного питания для здорового образа жизни. Напишите мини-сочинение по данной теме.

5 лет назад

Предмет: Геометрия, автор: nikitka010986

. Відомо, що а||b та кут 1 + кут 4 = 60°. Знайди кут 3.

5 лет назад

Предмет: Химия, автор: Аноним

укажите соединение, которое образуется при межмолекулярной дегидратации этилового спирта!!!???

9 лет назад

Предмет: Математика, автор: Аноним

за 6 кг конфет заплатили 720р сколько заплатят за 9 кг таких конфет

9 лет назад