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简介
我们之前学过两位数乘两位数，三位数乘两位数能用之前的方法计算吗？在本次活动中，学生先使用木板卡片进行拼摆实验，完成整百数乘两位数的计算，然后用图形分割卡片完成整十数乘两位数的计算，发现横式计算和竖式计算的联系；再用长方形卡片探究积的变化规律；最后用图形分割卡片解决三位数乘两位数，发现横式计算和竖式计算的联系。
学习目录
购买完成后即可查看课程目录～
{
"i18nChapterName": " ",
"i18nUnitName": " ",
"i18nLessonName": " ",
"i18nTaskName":"任务"
}
{
"text": {
"icon": "es-icon es-icon-graphic",
"name": "图文"
}
,
"video": {
"icon": "es-icon es-icon-video",
"name": "视频"
}
,
"audio": {
"icon": "es-icon es-icon-audio",
"name": "音频"
}
,
"live": {
"icon": "es-icon es-icon-entry-live",
"name": "直播"
}
,
"discuss": {
"icon": "es-icon es-icon-discuss",
"name": "讨论"
}
,
"flash": {
"icon": "es-icon es-icon-flash",
"name": "Flash"
}
,
"doc": {
"icon": "es-icon es-icon-document",
"name": "文档"
}
,
"ppt": {
"icon": "es-icon es-icon-ppt",
"name": "PPT"
}
,
"testpaper": {
"icon": "es-icon es-icon-examination",
"name": "考试"
}
,
"homework": {
"icon": "es-icon es-icon-task",
"name": "作业"
}
,
"exercise": {
"icon": "es-icon es-icon-exercise",
"name": "练习"
}
,
"download": {
"icon": "es-icon es-icon-downloadfile",
"name": "下载资料"
}
,
"replay": {
"icon": "es-icon es-icon-zhibohuifang",
"name": "直播回放"
}
,
"pseudolive": {
"icon": "es-icon es-icon-a-Frame8",
"name": "智能直播"
}
}
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