Вопрос школьника по предмету Математика
объясните почему число -30 нельзя представить в виде разности положительного числа и отрицательного?
Ответ учителя по предмету Математика
Вообще любое отрицательное число нельзя представить в виде разности положительного и отрицательного числа.
Похожие вопросы от пользователей
23.Rewrite the questions, using the modal need. Answer them expressing obligation or the absence of necessity.
Example≈Is it neccessary for him to do it now? Need he do it?
1)Is it neccessary for us to read the text?
2)Is it neccessary for me to wait for you?
3)Is it neccessary for him to learn about this?
4)Is there any need for tou tu explain your choice?
5)Is it neccessary for me to go to the meeting?
6)Is there any need for you to tell him the truth?
7)Is it neccessary for me to buy some bread?
8)Is it neccessary for me to leave at once?
24. Give the opposite of the following.
Example≈ You must come at 9 o’clock. (the classes begin at 10 o’clock)
You needn’t come at 9 o’clock as the classes begin at 10.
1)You must speak louder. (I hear you quite well)
2)He must hurry if he wants to catch the train. (he has plenty of time)
3)I must stay at home tonight. (nobody is going to call on me)
4)You must buy this dictionary. (you can borrow it from the library)
5)You must wait for your friend/ (you’ll ring him up in the evening)
6)You must help your brothet. (he is old enough to do it)
7)You must ring up home at once. (I’ve just had a talk with my family)
8)You must speak to the Dean to arrange the matter. (The teacher has already solved the problem)