Предмет: Математика, автор: nastenka123321

чему равна сумма всех трехзнатных чисел,первая цифра которых 7,а третья 2???

Ответы

Автор ответа: nuli977

0

700*10=7000

2*10=20

0+10+20+30+40+50+60+70+80+90=450

7000+450+20=7470

Автор ответа: Marmelad12

0

702+712_722+732+742+752+762+772+782+792=7475

Ответ: 7475

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