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SenyaQ
@SenyaQ
October 2021
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Помогите пожалуйста,
выполните действия 1.(2 1/3 + 0,25)*0,12 2.(7,6-4 3/4):1,9
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Siva39
Решаем оба задания по действиям.
1. (2 1/3 + 0,25)
*0,12= 0,31
1) 2 1/3 + 0,25 = 2 1/3 + 25/100= 2 1/3 + 1/4 = 2 4/12 + 3/12 = 2 7/12
2) 2 7/12*0,12= 31/12 * 12/100 = 31/100 = 0,31
2.
(7,6-4 3/4):1,9 = 1,5
1) 7,6 - 4 3/4= 7 6/10 - 4 3/4 = 7 12/20 - 4 15/20 = 6 32/20 - 4 15/20 = 2 17/20
2) 2 17/20 : 1,9 = 57/20 : 1 9/10 = 57/20 : 19/10 = 57/20 * 10/19 = 3/2 = 1,5
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Answers & Comments
1. (2 1/3 + 0,25)*0,12= 0,31
1) 2 1/3 + 0,25 = 2 1/3 + 25/100= 2 1/3 + 1/4 = 2 4/12 + 3/12 = 2 7/12
2) 2 7/12*0,12= 31/12 * 12/100 = 31/100 = 0,31
2. (7,6-4 3/4):1,9 = 1,5
1) 7,6 - 4 3/4= 7 6/10 - 4 3/4 = 7 12/20 - 4 15/20 = 6 32/20 - 4 15/20 = 2 17/20
2) 2 17/20 : 1,9 = 57/20 : 1 9/10 = 57/20 : 19/10 = 57/20 * 10/19 = 3/2 = 1,5