二年级上册数学课件－9.1 长颈鹿与小鸟北师大版

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长颈鹿和小鸟,北师大版二年级数学上册,( )9 =45,7( ) = 56,( )5 = 35,9( ) = 63,3( ) = 21,( )6 =42,8,5,7,7,7,7,我们有42只,6只小鸟住一间房子。,一共有42只小鸟。,造一间房子需要7块小木板。,6只小鸟住一间房子。,点,表,线,口诀,题,画图法,列表法,1,6,2,12,3,18,4,24,5,30,6,36,7,42,42,36,30,24,18,12,6,0,-6,-6,-6,-6,-6,-6,-6,42-6-6-6-6-6-6-6=0,连减法,减了（ 7 ）个6,7 = 56,9 = 63,3 = 21,7 = 28,9 = 45,6 = 42,5 = 35,8 = 64,8,7,7,4,5,7,7,8,7,9,8,有63只小鸟,平均分成7队, 每队有几只小鸟?,63,7,9,(只),