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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,*,十几减8、7、6练习,新人教版数学一年级下册,基础练习,127=,118=,136=,157=,189=,167=,7 + 5=,178=,146=,8 + 9=,116=,159=,5,3,7,8,9,9,12,9,8,17,5,7,157=8,189=9,116=5,个位不够减，要用退位减；个位能够减，不用退位减。,11 9 =,12 9 =,13 9 =,14 9 =,15 9 =,16 9 =,17 9 =,18 9 =,你发现了什么？,2,3,4,5,6,7,8,9,1,1,9,=,2,1,2, 9 =,3,1,3, 9 =,4,1,4, 9 =,5,1,5, 9 =,6,1,6, 9 =,7,1,7, 9 =,8,1,8, 9 =,9,。,十几减9，是几加1,11 8 =,12 8 =,13 8 =,14 8 =,15 8 =,16 8 =,17 8 =,你发现了什么？,3,4,5,6,7,8,9,1,1,8,=,3,1,2, 8 =,4,1,3, 8 =,5,1,4, 8 =,6,1,5, 8 =,7,1,6, 8 =,8,。,十几减8，是几加2,11 7 =,12 7 =,13 7 =,14 7 =,15 7 =,16 7 =,你发现了什么？,4,5,6,7,8,9,1,1,7,=,4,1,2, 7 =,5,1,3, 7 =,6,1,4, 7 =,7,1,5, 7 =,8,1,6, 7 =,9,。,十几减7，是几加3,11 8 =,13 7 =,13 6 =,18 9 =,15 8 =,17 9 =,11 7 =,14 6 =,3,6,7,9,7,8,4,8,15 9 =,12 7 =,13 9 =,15 7 =,11 6 =,16 9 =,17 8 =,14 8 =,6,5,4,8,5,7,9,6,破十法儿歌,退位减，我会算,十几减,9,，是几加,1,，,十几减,8,，是几加,2,，,十几减,7,，是几加,3,，,十几减,6,，是几加,4,，,十几减,5,，是几加,5.,减九想一,11-9，见减数9想1,1加上被减数个位上的1得2，所以11-9=2,减八想二,11-8，见减数8想2,2加上被减数个位上的1得3，所以11-8=3,减七想三,11-7，见减数7想3,3加上被减数个位上的1得4，所以11-7=4,减六想四,11-6，见减数6想4,4加上被减数个位上的1得5，所以11-6=5,书本P15.3,138=5,158=7,168=8,128=4,118=3,148=6,178=9,108=2,127=5,147=7,167=9,137=6,117=4,157=8,116=5,156=9,146=8,166=10,136=7,1,3,8=,5,1,5,8=,7,1,6,8=,8,1,2,8=,4,1,1,8=,3,1,4,8=,6,1,7,8=,9,1,0,8=,2,1,2,7=,5,1,4,7=,7,1,6,7=,9,1,3,7=,6,1,1,7=,4,1,5,7=,8,1,1,6=,5,1,5,6=,9,1,4,6=,8,166=10,1,3,6=,7,加油！加油！,2,5,8,11,3,9,4,6,10,7,书本P15.2,我会算！,7,12,15,7,9,2,6,14,14,18,4,13,书本P16.7,5,8,9,11-6=5,15-7=8,18-9=9,6,12,-,6,6,一个数加上7，它的得数比15小比11大，请问这个数是几？,我最聪明,( ) + 7 15,11,12,13,14,( ) + 7 =12,( ) + 7 =13,( ) + 7 =14,6,5,7,换奖品,儿童时代,8分换一本,两次得分够换一本吗？,还多几分？,6+7=13分,13-8=5分,答：两次得分够换一本，还多5分。,
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