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natalia19802
@natalia19802
July 2022
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помогите пожалкйста решить 1 и 2 задание
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1)
2 1/2 × 1,6 - 41,6 ÷ 4 = 2,5×1,6 - 41,6÷4 = 4 - 10,4 = -6,4.
2)
а) 7а+4b-9b-3a = 4a-5b.
б) x-4-(3x+2) = x-4-3x-2 = -2x-6.
в) 4(2,5b-3)-(5b+8) = 10b-12-5b-8 = 5b-20.
1 votes
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natalia19802
спасибо
Violleta130704
1) 2,5*1,6=3
2)41,6:4=10,4
3)3-10,4=-7,4
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Answers & Comments
2 1/2 × 1,6 - 41,6 ÷ 4 = 2,5×1,6 - 41,6÷4 = 4 - 10,4 = -6,4.
2)
а) 7а+4b-9b-3a = 4a-5b.
б) x-4-(3x+2) = x-4-3x-2 = -2x-6.
в) 4(2,5b-3)-(5b+8) = 10b-12-5b-8 = 5b-20.
2)41,6:4=10,4
3)3-10,4=-7,4