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sabina20043
@sabina20043
July 2022
2
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помогите: Раскрыть скобки и найти значение выражения: 1) (-34,8+42,16)-(23,7-34,8+42,16)+18,5;
2) (7 4/21-3 9/28)-(1 5/28-3 10/21)
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meinzm
-34,8+42,16-23,7+34,8-42,16+18,5=-5,2
7 4/21-3 9/28-1 5/28+3 10/21 = 151/21-93/28-33/28+73/21 = 224/21-126/28
2 votes
Thanks 6
sabina20043
спасибо
niktory
1) (-34,8+42,16)-(23,7-34,8+42,16)+18,5 = -34,8+42,16-23,7+34,8-42,16+18,5=-23,7+18,5= -5,2
2) (7 4/21-3 9/28)-(1 5/28-3 10/21) = 7 4/21 - 3 9/28 - 1 5/28 + 3 10/21 = 10 14/21 - 4 14/28 = 10 2/3 - 4 2/4 = 10 8/12 - 4 6/12 = 6 2/12 = 6 1/6
6 votes
Thanks 9
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Answers & Comments
7 4/21-3 9/28-1 5/28+3 10/21 = 151/21-93/28-33/28+73/21 = 224/21-126/28
2) (7 4/21-3 9/28)-(1 5/28-3 10/21) = 7 4/21 - 3 9/28 - 1 5/28 + 3 10/21 = 10 14/21 - 4 14/28 = 10 2/3 - 4 2/4 = 10 8/12 - 4 6/12 = 6 2/12 = 6 1/6