搭积木,北师大版一年级数学上册课件,一边玩一边说,再放_个，拿走_个。,多 +,少 -,上页,退出,上页,退出,我先摆13块，,再摆2块。,上页,退出,我摆18块，,拿走2块。,12+6=18,相碰的做加法,退出,上页,相碰的做减法,182=16,上页,退出,13,3,10,17,17,5,12,退出,上页,3,5,197= 13+5= 16 7= 15+3=12+6= 5+13= 16 4= 15+4=,12,18,18,18,18,9,12,19,谁能帮帮我？,上页,退出,登长城,6,14,7,20,16,10,18,19,13,退出,上页,再见,上页,首页,
