3D彩票的跨度是指所选数字的最大差值。例如，选择“123”这组数字，其跨度为2（即最大数字“3”与最小数字“1”的差值）。3D彩票的跨度值范围是0到9，具体的跨度值及其对应的数字组合如下：
跨度0：000, 111, 222, 333, 444, 555, 666, 777, 888, 999
跨度1：001, 010, 011, 100, 101, 110, 112, 121, 122, 211, 212, 221, 223, 232, 233, 322, 323, 332, 334, 343, 344, 433, 434, 443, 445, 454
跨度2：002, 012, 022, 113, 123, 133, 224, 234, 244, 335, 345, 355, 446, 456, 466, 557, 567
跨度3：003, 013, 023, 114, 124, 134, 225, 235, 245, 336, 346, 356, 447, 457, 467, 558, 568, 578
跨度4：004, 014, 024, 115, 125, 135, 226, 236, 246, 337, 347, 357, 448, 458, 468, 559, 569, 579
跨度5：005, 015, 025, 116, 126, 136, 227, 237, 247, 338, 348, 358, 449, 459, 469, 550, 560, 570
跨度6：006, 016, 026, 117, 127, 137, 228, 238, 248, 339, 349, 359, 440, 450, 460, 551, 561, 571
跨度7：007, 017, 027, 118, 128, 138, 229, 239, 249, 330, 340, 350, 441, 451, 461, 552, 562, 572
跨度8：008, 018, 028, 119, 129, 139, 230, 240, 250, 331, 341, 351, 442, 452, 462, 553, 563, 573
跨度9：009, 019, 029, 120, 130, 140, 231, 241, 251