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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,比一比、赛一赛,6 + 4 =,7 + 3 =,4 + 2 =,9 - 9 =,10 - 2 =,填一填,1,、,1,个十 ,,4,个一合起来是( ),2,、,18,里面有( )个十 ,( )个一,14,1,8,搭积木,北师大版一年级数学上册课件,一共,用了多少块积木?,13,2,数一数,3+2,5,10+5,15,3,+,2,5,1,3,+,2,1,5,8-2=6,1,8-2=6,8,-,2,6,18,-,2,16,试一试,14+5=,17,6=,19,11,11,12,13,14,15,16,17,+2,13+2=,15,下面的做法你能看懂吗?,记数法,14,15,16,17,18,19,20,-2,18-2=,16,10+3=,13, =,13,3,10,17,17,5,12,哪两个数加起来是,18,?填在算式中。,7,13,8,6,12,11,10,9,+ =,19,7=,12,12,+6=,18,13,+5=,5,+15=,18,20,16,3=,13,16,4=,12,15,+3=,18,15,+4=,19,相碰的做加法,相碰的做减法,
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