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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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