DAI SO: TIET 12: B AI HO C BO S UNG KI EN THUC: §10_ ?1 Dien vao cho trong: a) a - a =…. ; b) a – 0 = …. ; c ) Dieu kien de co hieu a – b la ………………. DAP AN: Ap dung : a – b = x neu b + x = a a) Ta co a – a = 0 vi a + 0 = a b) Ta co a – 0 = a vi 0 + a = a c) Trong tap hop so tu nhien thi dieu kien de co hieu a – b la a > b hoac a = b ?2 Dien vao cho cham : a) 0:a=…0……(a khac 0) b) a:a=…1…….(a khac 0) c) a:1=…a……. GHI NHO : (SGK) ?3 Dien vao o trong trong bang sau: So bi chia 600 1312 15 67 So chia 17 32 0 13 Thuong 35 41 Math EROR 4 BAI TAP: 41. Tu HUE – NHA TRANG = HA NOI – NHA TRANG tru Di HA NOI – HUE = 1278 – 658 = 620 (km) Tu NHA TRANG – TP HO CHI MINH = HA NOI – TP HO CHI MINH tru di HA NOI – NHA TRANG =1710 – 1278 = 432 (KM) 42. HOC SINH TU LAM 43. GIAI: KHI CAN THANG BANG TA CO KHOI LUONG QUA BI CONG VOI 100G THI BANG 1 KG CONG VOI 500G. VAY KGOI LUONG QUA BI LA : 1KG + 500G – 100G = 1400G 44. a) x = 533 b) x = 102 c) x = 0 d) x = 103 e) x = 3 g) x thuoc moi so tu nhien khac 0 deu thoa man : x thuoc N* 45. a 392 278 357 360 420 b 28 13 21 14 35 q 14 21 17 25 12 r 0 5 0 10 0 46. HOC SINH TU LAM Giao vien day NGUYEN VAN DINH . chia 60 0 1312 15 67 So chia 17 32 0 13 Thuong 35 41 Math EROR 4 BAI TAP: 41. Tu HUE – NHA TRANG = HA NOI – NHA TRANG tru Di HA NOI – HUE = 1278 – 65 8 = 62 0. khac 0 deu thoa man : x thuoc N* 45. a 392 278 357 360 420 b 28 13 21 14 35 q 14 21 17 25 12 r 0 5 0 10 0 46. HOC SINH TU LAM Giao vien day NGUYEN VAN DINH