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Светлана320
@Светлана320
August 2022
2
5
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Сколько будет (решите по действиям)
2/3*5/7-3/14:(-4 1/2)-2 2/3
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LFP
Verified answer
2/3*5/7 = 10/21
-3/14:(-4 1/2) =
3/14*(2/9) = 1/21
2 2/3 = 8/3 = 56/21
получилось: (10/21) + (1/21) - (56/21) = (11-56)/21 = -45/21 = -15/7 = -2_1/7
21 votes
Thanks 25
Galinka23
Verified answer
1)2/3 × 5/7 = 10/21
2)3/14 ÷ (- 4 1/2) = 3/14 ÷ ( - 9/2) = 3/14 × ( - 2/9) = - 1/21
3)10/21 - (- 1/21) = 10/21 + 1/21 = 11/21
4)11/21 -2 2/3 =11/21 - 2 2/3 = 11/21 - 8/3 = (11 × 1 - 8 × 7)/21 = 11/21 - 56/21 = - 45/21 = - 15/7 = - 2 1/7
ОТВЕТ : - 2 1/7
21 votes
Thanks 26
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Answers & Comments
Verified answer
2/3*5/7 = 10/21-3/14:(-4 1/2) = 3/14*(2/9) = 1/21
2 2/3 = 8/3 = 56/21
получилось: (10/21) + (1/21) - (56/21) = (11-56)/21 = -45/21 = -15/7 = -2_1/7
Verified answer
1)2/3 × 5/7 = 10/212)3/14 ÷ (- 4 1/2) = 3/14 ÷ ( - 9/2) = 3/14 × ( - 2/9) = - 1/21
3)10/21 - (- 1/21) = 10/21 + 1/21 = 11/21
4)11/21 -2 2/3 =11/21 - 2 2/3 = 11/21 - 8/3 = (11 × 1 - 8 × 7)/21 = 11/21 - 56/21 = - 45/21 = - 15/7 = - 2 1/7
ОТВЕТ : - 2 1/7