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,数学西师大版 一年级下,整十数加、减整十数的口算,数学西师大版 一年级下整十数加、减整十数的口算,1,5+2=,5,里面有（ ）个一，,2,里面有（ ）个一，,5,个一加,2,个一是（ ）个一，就是（ ）。,7,5,2,7,7,6-4=,6,里面有（ ）个一，,4,里面有（ ）个一，,6,个一减,4,个一是（ ）个一，就是（ ）。,2,6,4,2,2,5+2=752776-4=26422,2,60,里面有（ ）个十。,80,里面有（ ）个十。,50,里面有（ ）个十。,7,个十是（ ）。,3,个十是（ ）。,6,8,5,70,30,60里面有（ ）个十。 6857030,3,100以内的整十数,20,（ ）,40,50,（ ）（ ）（ ）,90,30,60,70,80,100以内的整十数30607080,4,整十数加、减整十数,整十数加、减整十数,5,数学西师大版一年级下册整十数加、减整十数的口算教学ppt课件,6,40,20,4,个十加,2,个十，等于（ ）个十，就是,( ),。,6,60,4,个,十,2,个,十,得：,6,个,十,60,40204个十加2个十，等于（ ）个十，就是( ),7,想：,4+2=( ),40+20=( ),6,6,0,6,0,想：4+2=( )66060,8,30+20=,40+40=,10+30=,50+20=,40+30=,70+20=,5,0,4,0,8,0,7,0,6,0,9,0,30+20=40+40=10+30=50+20=40+30=,9,数学西师大版一年级下册整十数加、减整十数的口算教学ppt课件,10,60,1,0,6,个十减,1,个十，等于,( ),个十，就是,( ),。,5,50,6,个,十,1,个,十,得：,5,个,十,50,60106个十减1个十，等于( )个十，就是(,11,5,0,想：,6-1=( ),60-50=( ),5,5,0,50想：6-1=( )550,12,70,-,20=,5,0,0,40,-,40=,50,-,30=,90,-,30=,60,-,10=,80,-,50=,6,0,3,0,2,0,5,0,70-20=50040-40=50-30=90-30=60-,13,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,黄球比白球,多,。,10,多,每盒10个每盒10个每盒10个每盒10个每盒10个每盒10个,14,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,每盒,10,个,白球比黄球,少,。,10,少,每盒10个每盒10个每盒10个每盒10个每盒10个每盒10个,15,30,-,20,=,10,（盒）,10,30-20=10（盒）10,16,30,-,20,=,10,（盒）,10,30-20=10（盒）10,17,5,0,50,18,1,0,10,19,数学西师大版一年级下册整十数加、减整十数的口算教学ppt课件,20,红色小棒比绿色小棒,少,20,根。,60,40,20,红色小棒比绿色小棒少20根。604020,21,50,20,30,绿色小棒比红色小棒,多,30,根。,502030绿色小棒比红色小棒多30根。,22,7,7,0,5,5,0,9,9,0,9,5,5,0,7705509909550,23,9,0,7,0,1,0,4,0,4,0,6,0,3,0,4,0,8,0,3,0,3,0,3,0,907010404060304080303030,24,数学西师大版一年级下册整十数加、减整十数的口算教学ppt课件,25,50,50,5050,26,70,70,7070,27,40,+,20,60,40+2060,28,40,+,50,90,40+5090,29,50,-,20,30,50-2030,30,30,-,20,10,30-2010,31,40,-,20,20,40-2020,32,40,+,20,60,40+2060,33,数学西师大版一年级下册整十数加、减整十数的口算教学ppt课件,34,谢谢大家,谢谢大家,35,