12 һǰ79ǣ 2. һ롣
1ͬѧŶ٣Сǰ4ˣ4ˣһһж?
2ͬѧŶ٣ǰСŵ4ӺСŵ5һһжˣ
3 18ݮ56˶ٸ10֣
417-4-10=3֧һ⡣10֣
5 10ǰУ 6ǣ 6ǰǣ (6) 1ʮ5һǣ (7)2ʮɵǣ
(8)141ǣ 141ǣ (9) 17ڵֱǣ ͣ
(10) 16У ʮͣ һ
(11) 1ʮ5һǣ 1ʮͣ һǣ (12) 18ڵǣ ͣ (13) 1610ࣨ 814٣
(14) 12ǰһǣ һǣ (15) 14У һͣ ʮ (16) 9һ1ʮǣ
(17) 10ǰһǣ һǣ (18) 20У ʮ
(19) ұ17С15ǣ (20) 1412֮䣬ǣ (21) 13ĸλǣ ʮλǣ 3ڿ
813 612 1914 1711 4Ӧ
Һ8ˡǰ6ˡһж?
СŶϷ5ֻСãұ6ֻСãһжֻСϷ10֣
ٶӵͬѧų2٣һ6ˣһ9ˣһˣ
Сһ飬쿴9ҳ쿴8ҳСһ˶ҳ
һȺŶϳǰŵӺǰŵ3һ㣬һŹжˣ
ո9飬ְָ5Сȥ2ոջм飿