Предмет: Математика, автор: Аноним

Представь выражение −49+19−51 в виде суммы положительных и отрицательных чисел.

Используя законы арифметических действий, вычисли значение данного выражения.

Ответ: значение данного выражения равно

Ответы

Автор ответа: iramazurk

2

(-49 + (-51)) + 19 =
-49 + (-51) = -49 - 51 = -100
-100 + 19 = -81

bad1912: как то не понятно

iramazurk: Всё понятно. Сначала сложены отрицательные числа, потом положительное. А ты просто сложил всё по порядку

Автор ответа: bad1912

1

Ответ:

-49+19-51=-81

-49+19=-30

-30-51=-81

что бы было легче посчитать составе числовую ось

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: hudjakova2011

Complete the sentences.
Example: At weekends I like reading magazines and newspapers. (read)
1. Would you mind ... the door (close)
2. Is she going to give up ... tennis? (play)
3. I'll have a cup of tea when I've finished ... the letter. (write)
4. The great painter enjoyed ... in this park. (walk)
5. She doesn't like ... . (travel)
6. Could you please stop ...? (laugh)
7. My nephew hates ... by heat. (learn)

1 год назад

Предмет: Английский язык, автор: Omg12

10 предложений на инфинитив и герундий,пжл очень надо,буду благодарна

1 год назад

Предмет: Английский язык, автор: Аноним

ПОМОГИТЕ ПОЖАЛУЙСТА! С АНГЛИЙСКИМ! ОЧЕНЬ НАДО!
Заполнить пропуски.

1.Заполните пропуски в предложении. He asks how long … at this company? Выберите один ответ: -she had been working -has she been working -she has been working -had she been working
2.Заполните пропуски в предложении. Tom said that his wife … . Выберите один ответ: -already came -had already come -has already come -had already come
3.Заполните пропуски в предложении. How long … for my brother? Выберите один ответ: -were you waiting -have you waited -have you been waiting -you have been waiting 4.Заполните пропуски в предложении. By the time we … home, she … cards with friends since the very morning. Выберите один ответ: -got, will play -get, will have played -get, will have been playing -have got, will be playing 5.Заполните пропуски в предложении. Since when … at this factory? Выберите один ответ: -did you work -you have worked -have you been working -was you working 6.Заполните пропуски в предложении. The specialist said that he … English in 1991. Выберите один ответ: -begun learning -had begun learning -has begun learning -began learning 7.Заполните пропуски в предложении. Tom asked if … for his brother? Выберите один ответ: -had we been waiting -we had been waiting -we were waiting -we have been waiting 8.Заполните пропуски в предложении. The students say that … a lot of books lately. Выберите один ответ: -they had been reading -they have read -they have been reading -they read 9.Заполните пропуски в предложении. Ann explained that she … the newspaper since five o'clock. Выберите один ответ: -has been reading -had been reading -had read -have been reading 10.Заполните пропуски в предложении. She … the work. Выберите один ответ: -has just finished -just has finished -has just been finishing -had just finished 11.Заполните пропуски в предложении. Ann asked the worker since when … at this factory? Выберите один ответ: -he had been worked -has he been working -he had been working -have you been working 12.Заполните пропуски в предложении. By the 5-th of July Ann … her new text-book. Выберите один ответ: -will have written -will be writing -will write -will have been writing 13.Заполните пропуски в предложении. He asked us … since early morning? We answered that we … for the examination. Выберите один ответ: -what had you been doing here, have been preparing -what you have been doing there, have prepared -what we had been doing there, had been preparing -what have you been doing here, had prepared 14.Заполните пропуски в предложении. By Friday we … for two days. Выберите один ответ: -shall walk -shall have walked -shall be walking -shall have been walking 15.Заполните пропуски в предложении. … at this company since 2007? Выберите один ответ: -she has been working -has she been working -was she working -has she worked 16.Заполните пропуски в предложении. What … here since early morning? – I … for my examination. Выберите один ответ: -you have been doing, was preparing -have you been doing, have been preparing -you have done, have prepared -have you done, have been preparing 17.Заполните пропуски в предложении. She … English in 1991. Выберите один ответ: -begins teaching -began teaching -begun teaching -has begun teaching 18.Заполните пропуски в предложении. Ann … the newspaper since five o'clock. Выберите один ответ: -was reading -has been reading -has read -have read 19.Заполните пропуски в предложении. When the meeting …, they … here yet. Выберите один ответ: -will be staring, will have been come -will start, will have been coming -starts, will have come -start, will be coming 20.Заполните пропуски в предложении. Before these students … to the competition the coach … them for 6 months. Выберите один ответ: -will go, will have been trained -will have gone, will have been training -go, will train -go, will have been training 21.Заполните пропуски в предложении. I … a lot of books lately. Выберите один ответ: -have read -have been reading -was reading -read 22.Заполните пропуски в предложении. He … . Выберите один ответ: -already has come -have been already coming -has come already -has already come 23.Заполните пропуски в предложении. Before Ann … for Spain we … at the project for 14 days. Выберите один ответ: -will leave, will be working -will have left, will have worked -leaves, shall have been working -leave, will have been working 24.Заполните пропуски в предложении. By the end of this year he … as a teacher for 10 years. Выберите один ответ: -will have worked -will work -will have been working -will been working 25.Заполните пропуски в предложении. Next year he… here. Выберите один ответ: -will not work -will not works -will not have been working -will not be working

1 год назад

Предмет: Математика, автор: настя5919

куб ребро куба 9 см найти V, сумма длин ребер быстрей пожолуйста срочно

8 лет назад

Предмет: Математика, автор: hollyо234567

2 пример помогите пожалуйста решить

8 лет назад