Предмет: Математика, автор: mustafinazhanna25

Найдите действие значение буквенного выражения используя свойства действий
1) 12+а+97 при а =8;3
2) 26+b+83 при b = 14;7
3) 49+c+38 при c = 51;62
4) 20a×15 при a =5;4
5) 25b×5 при b = 4;12
6) 8c×12при b = 125;3
Помогииииитееее!!!!! Срочноооо!!!! Даю 15 баллов за правельный ответ, за всё решение и за полный ответ. ​

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Ответы

Автор ответа: aruzhankomekbai2009
0

Ответ:

12+а+97 при а = 8; 3;

При а = 8: 12+8+97=117 a = 3: 12+3+97=112

28+b+83 при b = 14; 7; При b = 14: 28+14+83=125 b = 7: 28+7+83=118

49+с+38 при с = 51; 62; При с = 51: 49+51+38=138 C = 62: 49+62+38=149.

20а умножить на 15 при а = 5; 4 a = 5: 20*5*15=1500

a = 4: 20*4*15=1200

25ь умножить на 5 при b=4; 12;

b = 4: 25*4*5=500 b = 12: 25*12*5=1500

8с умножить на 12 при с=125; 3 c = 125: 8*125*12=12000 c = 3: 8*3*12=288

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