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1、十几减几练习课(一),拆十法儿歌,退位减,我会算 十几减9,是几加1, 十几减8,是几加2, 十几减7,是几加3, 十几减6,是几加4, 十几减5,是几加5,,11 9 = 2,12 9 = 3,13 9 = 4,14 9 = 5,15 9 = 6,16 9 = 7,17 9 = 8,18 9 = 9,得数只要看十几的个位是几,得数就是比几多1,19 9 = 10,计算十几减9,11 8= 3,12 8 = 4,13 8 = 5,14 8 = 6,15 8 = 7,16 8 = 8,17 8 = 9,18 8 = 10,得数只要看十几的个位是几,得数就是比几多2,计算十几减8,11 7 = 4
2、,12 7 = 5,13 7 = 6,14 7 = 7,15 7 = 8,16 7 = 9,17 7 = 10,得数只要看十几的个位是几,得数就是比几多3,计算十几减7,11 6 = 5,12 6 = 6,13 6 = 7,14 6 = 8,15 6 = 9,16 6 = 10,得数只要看十几的个位是几,得数就是比几多4,计算十几减6,11 5 = 6,12 5 = 7,13 5 = 8,14 5 = 9,15 5 = 10,得数只要看十几的个位是几,得数就是比几多5,计算十几减5,5,6,7,8,8,7,9,9,9,17,9,6,书本P16-4,抢答.并写算式,13-8=5,15-8=7,1
3、6-8=8,12-8=4,11-8=3,14-8=6,17-8=9,10-8=2,11-2=9,11-3=8,11-5=6,11-4=7,12-3=9,12-5=7,12-4=8,书本P16-3,4,6,9,7,3,14-8,11-7,13-4,13-6,12-9,书本P17-5,书本P17-6,书本P17-7,7,12,15,7,9,2,6,14,14,20,9,18,书本P17-8,6,15-7,9,13-9,14-8,13-4,11-7,12-5,8,17-8,4,8,7,6,7,6,5,6,7,8,书本P18,6,9,8,7,6,7,=,5,4,9,8,2,3,6,7,5,书本P18,12,-,5,7,书本P18,书本P18,通过这两天的学习,你对十几减几的 计算有信心吗? 你能说一说十几减几都有哪些算法吗?,说一说:,