一年级上册数学一课一练-7.3有几瓶牛奶 北师大版（2014秋）（含答案）.docx

一年级上册数学一课一练-、单选题1. 9+2=( )A. 11                                         B. 15                                         C. 17                                         D. 62.  9+6=( )A.  1                               B. 9                               C. 14                               D. ,另一个加数是6,和是(   )。A. 12                                       B. 13                                        C. 14                                       D. ,又买来5个,一共有________个.( )A. 4                                         B. 13                                         C. 14                                         D. 30二、+9=9+6。,正确的填“正确”,错误的填“错误”.9+8=18三、+9=、+9=,,、+________=,写算式计算. ________  ________  ________ =________五、计算题13.(从上到下依次填写)六、?。参考答案一、单选题1.【答案】A【解析】 2.【答案】D【解析】3.【答案】D【解析】【解答】一个加数是9,另一个加数是6,和是15。【分析】根据已知,一个加数是9,另一个加数是6,和是9+6,根据凑十法,9和1凑成10,而6能分成1和5,所以9和6分成的1凑成10,10加5是15。故选:D。本题主要考查整数的认识。 4.【答案】C【解析】【解答】二、判断题5.【答案】正