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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,*,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,*,十几减,9,SJ,一年级下册,9+7,9+4,9+8,9+5,9+,( ),11 9+,( ),12,9+,( ),15 9+,( ),18,16,13,17,14,2,3,6,9,1,个十和,5,个一合起来是多少?,1 3,里面有几个十和几个一?,9,可以分成几和几,还可以分成几和几?,9,4,9,7,10,9,6,16,6,5,9,( ),11 9,( ),17,我买,9,个。,13,9 =,(个),13,9 =,(个),13,9 =,(个),先减去,3,个,,再减去,6,个。,连减法,(,平十法),13,9 =,(个),从,10,个里减去,9,个,破十法,13,9 =,(个),9,加,(,4,),得,13,,,13,减,9,得,4,。,想加算减法,13,9 =,(个),你喜欢哪种方法?,4,先减去,3,个,,再减去,6,个。,从,10,个里减去,9,个,9,加,(,4,),得,13,,,13,减,9,得,4,。,1,、,先圈一圈,再计算。,12,9,16,9,12,9,3,破十:,10,9,1,2,1,3,12,9,10,2,1,3,12,9,3,连减:,12,2,10,10,7,3,12,9,2,7,10,3,16,9,7,16,9,7,15,个,15,9,(个),6,?个,2,、,17,根,?根,17,9,(根),8,12,9 = 3,4,.,15,9 = 6,17,9 = 8,13,9 = 4,16,9 = 7,19,9 = 10,11,9 = 2,18,9 = 9,14,9 = 5,10,9 = 1,谢 谢,
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