记忆力--学速算8+...

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标签: 记忆力  数字训练
xiaoyuer0418 发布于: 2016-12-18 18:59 780 次浏览 9 位用户参与讨论
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本帖最后由 xiaoyuer0418 于 2016-12-19 16:12 编辑


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先看看儿童学习速算的三大好处:
一、让孩子的左右脑平衡发展
  孩子在速算学习中,会经常使用到自己的左右手,这就会让孩子的左右手更加灵活,这些锻炼,会让孩子的左右大脑都得到均衡的发展,对提高孩子的智力来讲是非常有帮助的。
  二、培养孩子的协调能力。
  孩子在进行速算学习的过程中,会使自己的眼、耳、手、口、脑同时参与,在大脑的指挥下,孩子的眼、耳、手、口会进行各自执行的工作,这种分工性质的工作,会让孩子的各项协调能力得到最佳的锻炼,这对孩子来讲是件非常好的锻炼机会。
  三、培养孩子的专注精神。
  有过速算学习经验的人,都会有个这样的体会,在进行速算学习的时候,身体的各个器官在大脑的统一调度之下,会进入到最佳的工作状态,最直接的体现是孩子的注意力会非常集中,这种锻炼,会让孩子今后在做事情的时候都可以做到精力集中。
【适合年龄】6岁以上

【训练目标】
1.锻炼孩子的专注力和记忆力
2.学会用速算方法最快得出正确的答案
【训练方法】
71f0009f73b7c57c2b3.jpg
1.十几乘十几:
口诀:头乘头,尾加尾,尾乘尾。
例:12×14=?
解: 1×1=1
2+4=6
2×4=8
12×14=168
注:个位相乘,不够两位数要用0占位。
2.头相同,尾互补(尾相加等于10):
口诀:一个头加1后,头乘头,尾乘尾。
例:23×27=?
解:2+1=3
2×3=6
3×7=21
23×27=621
注:个位相乘,不够两位数要用0占位。
3.第一个乘数互补,另一个乘数数字相同:
口诀:一个头加1后,头乘头,尾乘尾。
例:37×44=?
解:3+1=4
4×4=16
7×4=28
37×44=1628
注:个位相乘,不够两位数要用0占位。


4.几十一乘几十一:
口诀:头乘头,头加头,尾乘尾。
例:21×41=?
解:2×4=8
2+4=6
1×1=1
21×41=861

5.11乘任意数:
口诀:首尾不动下落,中间之和下拉。
例:11×23125=?
解:2+3=5
3+1=4
1+2=3
2+5=7
2和5分别在首尾。
11×23125=254375
注:和满十要进一。

6.十几乘任意数:
口诀:第二乘数首位不动向下落,第一因数的个位乘以第二因数后面每一个数字,加下一位数,再向下落。

例:13×326=?
解:13个位是3
3×3+2=11
3×2+6=12
3×6=18
13×326=4238
注:和满十要进一。
【训练成绩】
家长可以变换不同的数式,让孩子熟悉运算

【延伸思考】
十个手指,手掌面向自己,从左往右数数。
1 个位比十位大1 ×9
口诀
个位是几弯回几,弯指左边是百位,          34×9=306           89×9=801
弯指读0为十位,弯指右边是个位。           78×9=702      45×9=405
2 个位比十位大 ×9
口诀
个位是几弯回几,原十位数为百位,          38×9=3.42           25×9=225
左边减去百位数,剩余手指为十位,             13×9=117            18×9=162
弯指作为分界线。弯指右边是个位。         
3 个位与十位相同×9
口诀
个位是几弯回几,弯指左边是百位,                 33×9=297            88×9=792
弯指读9为十位,弯指右边是个位。                  44×9=396
4 个位比十位小×9
十位减1,写百位,原个位数写十位,94×9=(9-1)×100+4×10+(100-94)=846
与百差几写个位(加补数),如差几十加十位。       83×9=(8-1)×100+ 30+17=747                                                                             62×9=(6-1)×100+2×10+(100-62)=558
加法
加大减差法
前面加数加上后面加数的整数,
减去后面加数与整数的差等于和(减补数)。
+1 -2
1378+98=1378—100+2=1476                    5768+9897=5768+10000—103=15665
求只是两个数字位置变换两位数的和
前面加数的十位数加上它的个位数,乘以11等于和
47+74=(4+7)×11=121                          68+86=(6+8)×11=154
58+85=(5+8)×11=143



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已有9人评论

xiaoyuer0418 发表于 2016-12-19 19:27:25
学会了这个,还怕数学吗
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qhz0-0-1 发表于 2016-12-20 16:10:27
这算是一种技能吧,数学也不是只算数,学会了这个,最起码计算不怕了
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