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leilac0506
@leilac0506
July 2022
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49. Упростите выражение и найдите его значение:
1) 3,4х + 5,6х, если х = 0,08;
2) 5,4а – 3,9а, если a = 0,26;
3) 1,8m – 0,5т + 0,7т, если т = 3,94;
4) 0,192 - 0,12z + 0,332 – 1,92, ecли = 8,2.
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Answers & Comments
marmeladka6969
1). 3,4х + 5,6х = 3,4•0,08 + 5,6•0,08 = 0,272 + 0,448 = 0,72
2). 5,4а - 3,9а = 5,4•0,26 - 3,9•0,26 = 1,404 - 1,014 = 0,39
3). 1,8m - 0,5т + 0,7т = 1,8m - 0,5 • 3,94 + 0,7 • 3,94 = 1,8m - 1,97 + 2,758 = 1,8m - 4,728
4). 0,192 - 0,12z + 0,332 - 1,92 = 0,192 - 0,12 • 8,2 + 0,332 - 1,92 = 0,192 - 0,984 + 0,332 - 1,92 = 0,524 - 0,984 - 1,92 = -0,45 - 1,92 = - 2,38
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Answers & Comments
2). 5,4а - 3,9а = 5,4•0,26 - 3,9•0,26 = 1,404 - 1,014 = 0,39
3). 1,8m - 0,5т + 0,7т = 1,8m - 0,5 • 3,94 + 0,7 • 3,94 = 1,8m - 1,97 + 2,758 = 1,8m - 4,728
4). 0,192 - 0,12z + 0,332 - 1,92 = 0,192 - 0,12 • 8,2 + 0,332 - 1,92 = 0,192 - 0,984 + 0,332 - 1,92 = 0,524 - 0,984 - 1,92 = -0,45 - 1,92 = - 2,38