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Автор - estik06

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Найдите число: а) противоположное; б) обратное значению выражения:
1) 1,5*4,8+1,5*5,2;
3)3,2*3,5+3,5*6,8
2)5,2*9,8-3,8*5,2;
4)16,4*15,3-16*5,3

Ответ

Автор - Svetlana565

1) 1,5*4,8+1,5*5,2=1,5*(4,8+5,2)=1,5*10=15

а) -15

б) frac{1}{15}

3) 3,2*3,5+3,5*6,8=3,5*(3,2+6,8)=3,5*10=35

а) -35

б) frac{1}{35}

2) 5,2*9,8-3,8*5,2=5,2*(9,8-3,8)=5,2*6=31,2

a) -31,2

б) frac{1}{31,2} =frac{5}{156}

4) 16,4*15,3-16,4*5,3=16,4*(15,3-5,3)=164

а) -164

б) frac{1}{164}

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