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кит53
@кит53
July 2022
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здравствуйте помогите пожалуйста решить пример (7,8:(4,3/7-1, 9/ 14) +0,312) :0,02 -3,89 *40
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prettypushkova
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(7,8 : (4 3/7 - 1 9/14) + 0,312) : 0,02 - 3,89 * 40 = 0
1) 4 3/7 - 1 9/14 = 4 6/14 - 1 9/14 = 3 20/14 - 1 9/14 = 2 11/14
2) 7,8 : 2 11/14 = 78/10 : 39/14 = 78/10 * 14/39 = (2*7)/(5*1) = 14/5 = 2,8
3) 2,8 + 0,312 = 3,112
4) 3,112 : 0,02 = 155,6
5) 3,89 * 40 = 155,6
6) 155,6 - 155,6 = 0
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(7,8 : (4 3/7 - 1 9/14) + 0,312) : 0,02 - 3,89 * 40 = 01) 4 3/7 - 1 9/14 = 4 6/14 - 1 9/14 = 3 20/14 - 1 9/14 = 2 11/14
2) 7,8 : 2 11/14 = 78/10 : 39/14 = 78/10 * 14/39 = (2*7)/(5*1) = 14/5 = 2,8
3) 2,8 + 0,312 = 3,112
4) 3,112 : 0,02 = 155,6
5) 3,89 * 40 = 155,6
6) 155,6 - 155,6 = 0