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Pupsik22845
@Pupsik22845
July 2022
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Помогите пожалуйста математика 6 класс упростите выражение и найдите его значение: 1)1/2а+34а при а =8 2)8,7b-5,3b при b=2 3)4,4c+5,8c при с =3 4)1/2а+1/3а+1/6а при а=12 5)9,7b-5,8b+4,1b при b =1,5 6) 2,9c+6,3c-4,2c при c =1,2.
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oksik1970
▪1) 1/2а+34а = (34 целых 1/2)а = 34,5а = 34,5 × 8 = 276;
▪2) 8,7b-5,3b = 3,4b = 3,4 × 2 = 6,8;
▪3) 4,4c+5,8c = 10,2с = 10,2 × 3 = 30,6;
▪4) 1/2а+1/3а+1/6а = (3/6)а + (2/6)а + (1/6)а = (6/6)а = а = 12
▪5) 9,7b-5,8b+4,1b = 8b = 8 × 1,5 = 12
▪6) 2,9c+6,3c-4,2c = 5c = 5 × 1,2 = 6
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Answers & Comments
▪2) 8,7b-5,3b = 3,4b = 3,4 × 2 = 6,8;
▪3) 4,4c+5,8c = 10,2с = 10,2 × 3 = 30,6;
▪4) 1/2а+1/3а+1/6а = (3/6)а + (2/6)а + (1/6)а = (6/6)а = а = 12
▪5) 9,7b-5,8b+4,1b = 8b = 8 × 1,5 = 12
▪6) 2,9c+6,3c-4,2c = 5c = 5 × 1,2 = 6