《万以内数的减法》教学设计

? ? ? ? ? ? 807358634267? 425436329659? ? 542179376524? ? ? 11? ? ? ? ? 2223? ? ? ? ? ? 22? 517507? ? ? ? ? ? 32514? 4? 321628?7324?1582? ?93?473?-?2538?847? 238?145?4786675? ? 243? ? ? ? ? ? ? 1? 78=80?87=?99=? 198=?297=? 78? 879999? ? 26?574+200?453300?456+198?725+79? 74897?356299? ?574+200?453300?4562002?725+801? 748100+3?3563001? ? ? ?1? 1?11359? 1? 259601111? 3? 113+59=?113+601?=172? 4798999? 2? 2?276?98? 1?27698? =?276? =? 21002? 22? 39897? 27697?=?2761003?=?373? 4333? 3? 4? 15687=15690?=? 74198=74200?=? 5? ? 3?16597? 197100? 210033? 3? 16597=1651003=68? 421? 22? 11? 51651001=165? 6? ? 38? ? 1? 89901? 198? 97? 299? 299? 2? a12668=126702? b9867=671002? c25399=2531001? d14289=14210011? 3? 276?=2762003? 435?=4353002? ?267=2671003? 534?=5343002? 4? 19798?98299? ? 1? 2? 4? 5? ? ? 27? ? ? ? ? ? ? ? ? ? ? 11? 1113548? 21200? 3? ? 135+48=183? 1?3?5? +?4?8? 1?8?3? ? ? ? ? ? ? ? ? 1183-13548? 248+135183? 3183-48135? ? 27? ? ? 1?7?5?3?2?9?2?5?9? +?6?2?+?4?6?4?+?1?4?8? 1?3?7?8?4?3?3?0?7? ? ? ? ? 28? ? ? ? ? ? ? ? ? ? 116520035? 2? 200183? 200-183=17? 2?0?0? -?1?8?3? 1?7? ? ? ? ? ? ? ? ? ? 120017183? 217183200? ? 28? ? 0129? ? ? 1?4?7?7?8?0?4?6?4? -?2?8?-?5?1?-?2?2?3? 1?2?9?7?3?9?2?4?1? ? ? ? ? ? 2931? ? 1? 2? ? ? 1? 2? 6?3?4?3?5?9?6?6?3?4?0?4?8?6?9?2?3?9? -1?8?4?+?4?7?1?-?2?8?2?-?1?8?6?-?5?7?8?+?5?7?1? 5?5?2?8?3?0?8?4?5?3?1?8?2?9?1?8?0?0? ? ? 3? 563+528=?696+241=?70+260=? 991837330? 1081937230? 10911037267? 4306? ? 5318? 500? 6? ? 7? 2934? 3057? ? ? 3233? ? ? ? ? ? ? ? ? ? ? 1? 2? 30? 4? 5? ? ? ? ? ? ? 1?8?7?7?2?6?9?4?0?7?0?8? +?5?9?+?5?9?8?-?7?6?2?-?3?8?9? ? ? ? 11? 21? ? ? ? 1? 2? 3? ? ? ? 4? ? 8? ? 44?2?3?5?0?0?5?0?1?3?0?1? +?3?4?9?-?4?5?3?+?3?8?9?-?8?4? 7?6?2?1?5?7?8?8?0?2?2?7? ? ? ? 12615795? ? ? 900337118? ? 337+118=455? ? ? 337+445=792? ? ? 900-792=108? ? ?