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Asahinosuzuki
@Asahinosuzuki
July 2022
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А) (-2,25+4 2/3)+(7,6-1 8/9)-7,6 В) (-4/15+1,18-5/7)+1 3/14+(-1,68+2 4/15) мне срочно !!!! Заранее спасибо
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prettypushkova
Verified answer
Раскроем скобки и сгруппируем:
а) = - 2,25 + 4 2/3 + 7,6 - 1 8/9 - 7,6 = (4 2/3 - 1 8/9) + (7,6 - 7,6 - 2,25) = 19/36
1) 4 2/3 - 1 8/9 = 4 6/9 - 1 8/9 = 3 15/9 - 1 8/9 = 2 7/9
2) (7,6 - 7,6) - 2,25 = 0 - 2 25/100 = - 2 1/4
3) 2 7/9 + (-2 1/4) = 2 28/36 - 2 9/36 = 19/36
б) = - 4/15 + 1,18 - 5/7 + 1 3/14 - 1,68 + 2 4/15 = (2 4/15 - 4/15) + (1 3/14 - 5/7) + (1,18 - 1,68) = 2
1) 2 4/15 - 4/15 = 2
2) 1 3/14 - 5/7 = 17/14 - 10/14 = 7/14 = 1/2 = 0,5
3) 1,18 - 1,68 = - 0,5
4) 2 + 0,5 = 2,5
5) 2,5 + (-0,5) = 2,5 - 0,5 = 2
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Answers & Comments
Verified answer
Раскроем скобки и сгруппируем:а) = - 2,25 + 4 2/3 + 7,6 - 1 8/9 - 7,6 = (4 2/3 - 1 8/9) + (7,6 - 7,6 - 2,25) = 19/36
1) 4 2/3 - 1 8/9 = 4 6/9 - 1 8/9 = 3 15/9 - 1 8/9 = 2 7/9
2) (7,6 - 7,6) - 2,25 = 0 - 2 25/100 = - 2 1/4
3) 2 7/9 + (-2 1/4) = 2 28/36 - 2 9/36 = 19/36
б) = - 4/15 + 1,18 - 5/7 + 1 3/14 - 1,68 + 2 4/15 = (2 4/15 - 4/15) + (1 3/14 - 5/7) + (1,18 - 1,68) = 2
1) 2 4/15 - 4/15 = 2
2) 1 3/14 - 5/7 = 17/14 - 10/14 = 7/14 = 1/2 = 0,5
3) 1,18 - 1,68 = - 0,5
4) 2 + 0,5 = 2,5
5) 2,5 + (-0,5) = 2,5 - 0,5 = 2