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1、,两位数乘一位数口算,三下,慈溪市实验小学教育集团 周 蕾,交换后，每人还是1个苹果。,交换后，每人会有2种想法。,小刚,小红,小刚,小红,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=,4902=,194=,147=,153=,153,3个 10,3个
2、 5,45,45,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=,4902=,194=,147=,153=,1.想一想，填一填。,472,94,80,14,195,95,50,45,243,72,154,60,想： +,60,12,想： +,40,20,
3、96,80,16,90,50,40,57,30,27,85,50,35,50,35,105=,95=,50+45=95,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=,4902=,194=,147=,153=,2. 看谁算得又对又快。,1306 2703
4、 2503 1505 2304 4180 1405 4902 1606,780,750,700,810,920,980,750,720,960,1306=,个十,780,就是(780)。,13 6 78,乘,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=
5、,4902=,194=,147=,153=,小 马 虎 做 口 算,17498,46282,28374,14798,12,24,4 7,7 4,14 7,17 4,70,40,3502700,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=,4902=,1
6、94=,147=,153=,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=,4902=,194=,147=,153=,1、组长出题，4人轮流答题，没轮到的同学做小裁判。,2、有人答错，要及时改正，并发给错题卡片。,3、全部答完后，有错题的同学，把错题重答
7、一遍。,比一比，看哪组是最佳合作小组！,乘法口算,1505=,372=,162=,244=,152=,2304=,283=,1804=,1207=,193=,154=,517=,2503=,314=,1606=,1304=,243=,163=,2702=,1306=,165=,2703=,185=,182=,156=,472=,1405=,128=,137=,164=,362=,462=,3502=,146=,174=,195=,4902=,194=,147=,153=,乘法口算,数学书练习九 第3题、第4题,限乘24人,24372（人） 答：3辆车最多可坐72人。,24496（人）,1802360（千克） 答：这只熊的体重是360千克。,9690,答：90人能坐下。,课堂作业：,请完成数学作业本第26页,仔细审题,书写整洁,
