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вапро45678
@вапро45678
October 2021
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Выполнить действия :
6,5*(1,2-4,(3))-9,9 :3+7,4*5-450
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prettypushkova
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6,5 * (1,2 - 4,(3)) - 9,9 : 3 + 7,4 * 5 - 450 = - 436 целых 2/3
1) 1,2 - 4,(3) = 1 цел.1/5 - 4 цел.1/3 = - (4 цел.5/15 - 1 цел.3/15) = - 3 цел.2/15
2) 6,5 * (-3 цел.2/15) = 6 цел.1/2 * (-3 цел.2/15) = - 13/2 * 47/15 = - 611/30 = - 20 цел.11/30
3) 9,9 : 3 = 3,3
4) 7,4 * 5 = 37
5) - 20 цел.11/30 - 3 цел.3/10 = - (20 цел.11/30 + 3 цел.9/30) = - 23 цел.2/3
6) - 23 цел.2/3 + 37 = 37 - 23 цел.2/3 = 36 цел.3/3 - 23 цел.2/3 = 13 цел.1/3
7) 13 цел.1/3 - 450 = - (449 цел.3/3 - 13 цел.1/3) = - 436 цел.2/3
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Answers & Comments
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6,5 * (1,2 - 4,(3)) - 9,9 : 3 + 7,4 * 5 - 450 = - 436 целых 2/31) 1,2 - 4,(3) = 1 цел.1/5 - 4 цел.1/3 = - (4 цел.5/15 - 1 цел.3/15) = - 3 цел.2/15
2) 6,5 * (-3 цел.2/15) = 6 цел.1/2 * (-3 цел.2/15) = - 13/2 * 47/15 = - 611/30 = - 20 цел.11/30
3) 9,9 : 3 = 3,3
4) 7,4 * 5 = 37
5) - 20 цел.11/30 - 3 цел.3/10 = - (20 цел.11/30 + 3 цел.9/30) = - 23 цел.2/3
6) - 23 цел.2/3 + 37 = 37 - 23 цел.2/3 = 36 цел.3/3 - 23 цел.2/3 = 13 цел.1/3
7) 13 цел.1/3 - 450 = - (449 цел.3/3 - 13 цел.1/3) = - 436 цел.2/3