1、1班别 姓名 成绩 一、用简便方法计算。(1)0.250.744 (2)2.51.250.32 (3)4.425(4)54.790.2 (5)2.5(2.80.4) (6) (82.57)1.2(7)12.5640.025 (8)6.91.250.8 (9)1.254.8(10)0.253.780.4 (11)0.253.21.25 (12)2.51.2548(13)2.57.320.4 (14)3.21.25 (15)480.25(16)1.250.980.7 (17)8.80.125 (18)8.59.92(19)13.5102 (20)0.5498 (21)0.68101班别 姓名 成绩
2、 一、用简便方法计算。(1)4.5199 (2)10.14.9 (3)3.1599(4)5.99.9 (5)7.6102 (6)5.710.1(7)3.59.9 (8)4.82102 (9)12.599(10)0.85101 (11)0.74101 (12)259.9(13)1.6102 (14)0.8799 (15)9.8253(16)0.65102 (17)10.19.8 (18)0.65201班别 姓名 成绩 一、用简便方法计算。(1)4.380.1250.8 (2)(12.4+16.8) 4 (3)3.9280.125(4)16.151.8+1.851.8 (5)(3.2+0.128)
3、 0.8 (6)9.80.254(7)71.842.5 (8)(6.3+8.1) 0.9 (9)9.190.1258(10)93050.6 (11)7.21.23 (12)0.661.25 (13)0.620.50.2(14)5.635 (15)4.518 (16)19.83.34(17)(16.8+1.47) 0.7 (18)(10.81.89) 0.9 (19)(3.2+0.128) 0.8班别 姓名 成绩 一、怎样简便怎样算。(1)0.253.20.125 (2)1.2580.80.3 (3)1.02458(4)4.2(10.3 )0.02 (5)1252.531+1252.5 (6)3.25(0.76+3.008)3.14 (7)8.40.0425 (8)0.490.40.5 (9)6.353.8+3.653.8 (10)(4.7+8.5) 0.80.35(11)34.60.46+34.60.54 (12)2.652+2.6492.6 (13)0.254.60.4(14)0.541.050.250.2 (15)281.250.8 (16)6.92.5+3.12.51