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1、人教新课标一年级数学下册,练 习 二,教学目标,1.通过练习，使同学们理解“十几减几”的算理，学会“十几减几”的口算方法，能正确计算“十几减几”的题目。 2.能根据自己的情况用自己喜欢的方法较熟练地计算“十几减几”的题目。,9+4= 13-9=,13,4,1.,12-9=,2.得数是几就圈上几个。,3,15-9=,6,14-9,17-9,15-9,18-9,11-9,16-9,12-9,13-9,4,3,6,5,8,7,2,9,3.,14-9,17-9,18-9,11-9,16-9,12-9,13-9,4,3,6,5,8,7,2,9,15-9,14-9,17-9,15-9,18-9,16-9,
2、12-9,13-9,4,3,6,5,8,7,9,2,11-9,14-9,17-9,15-9,18-9,11-9,16-9,12-9,3,6,5,8,7,2,9,4,13-9,17-9,15-9,18-9,11-9,16-9,12-9,13-9,4,3,6,5,8,7,2,9,14-9,14-9,17-9,15-9,18-9,11-9,12-9,13-9,4,3,6,5,8,2,9,7,16-9,14-9,17-9,15-9,11-9,16-9,12-9,13-9,4,3,6,5,8,7,2,9,18-9,14-9,15-9,18-9,11-9,16-9,12-9,13-9,4,3,6,5,8,7,2,9,17-9,14-9,17-9,15-9,18-9,11-9,16-9,4,6,5,8,7,2,9,13-9,3,12-9,5,8,7,2,9,17-9,14-9,11-9,18-9,16-9,你们真棒！,6.,16-9=7,8.,13-9=4,谢谢！,
