How to teach children finger speed algorithm

1、 Using game form, arouse children's interest: mathematics is a boring subject, and children are generally immature, they always like what they are interested in. Therefore, the first step of teaching any classroom is to arouse children's interest and attract children's attention

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1. The magic cross formula and the following formula Before my friends taught me to play for several years, but I forgot the pithy formula. I remember the cross pithy formula. It seems to be up left down left up left down, but I can't turn the cross. After the cross turns better, I need to use the pithy formula for color and color. Finally, I need to use the comprehensive pithy formula for lecherous. Please give me some advice! Don't come to me like lur. I can't understand the video. Please answer carefully
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