(
课件网) 小 数 的 意 义 “1” = 0.9 = 0.1 “1” = 0.1 = 0.9 = 0.2 = 0.8 “1” = 0.1 = 0.9 = 0.2 = 0.8 “1” = 0.3 = 0.7 “1” = 0.1 = 0.9 = 0.2 = 0.8 = 0.3 = 0.7 = 0.4 = 0.6 “1” = 0.1 = 0.9 = 0.2 = 0.8 = 0.3 = 0.7 = 0.4 = 0.8 = 0.5 “1” = 0.01 “1” = 0.56 = 0.44 “1” = 0.01 = 0.56 = 0.44 = 0.57 = 0.43 = 0.58 = 0.42 = 0.60 = 0.6 1 0.1 0.01 0.001 1 0.1 0.01 0.001 10个 10个 10个 填一填: 分数:( ) 小数:( ) 0.7 (1) (2) 分数:( ) 小数:( ) 0.44 填一填: 分数:( ) 小数:( ) 0.7 (1) (2) 分数:( ) 小数:( ) 0.44 4个0.1 4个0.01 填一填: 分数:( ) 小数:( ) 0.7 (1) (2) 小数:( ) 1.44 填一填: 分数:( ) 小数:( ) 0.7 (1) (2) 小数:( ) 2.44 选一选: 0.47 0.9 0.0001 0.13 0.047 =0.001 = 0 估一估: 0 1 0.5 0.2 0.3 0.4 0.3 0.4 0.31 ……