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Mathematical problems in the third grade of primary school
1, 9 pens =24 rulers =84 erasers, and the price of each table is three times that of each chair, so 1 table =3 chairs. 90/3=30 yuan per table in 30 yuan. 3. Chinese and math * * got 180, Chinese and science * * got 177, math and science * * got 18 1, Chinese+math+science = (1.