Yes, we are going to start the multiplication study of 6-9. What's the difference between the multiplication study of 6-9 and the previous study?
1, run the number axis
It is obviously impossible to jump on such a long shaft, so run!
In groups of three, * * * move forward together: one 6 is 6, two 6 is 12, three 6 is 18, and four 6 is 24 ... What is seven six? Ah! It's stuck. What a hurry!
Teacher Qian Nan smiled and raised her eyebrows to remind her that a small shell next to her was gesturing anxiously. The three brothers were unmoved and calmly responded: six sixes are 36, so seven sixes should be 43! No, seven sixes should be 42, 36+6=36+4+2=42. Right, right, right, keep walking. ...
In the whole process, children move forward with thinking, participate wholeheartedly and cooperate with partners. This is a process of thinking and playing.
How about we try to jump backwards this time? The multiple of 10 8 is 80, the multiple of 9 8 is 72, the multiple of 8 8 is ... 64, and the multiple of 8 is ... 56 ... It's really not easy to jump backwards in the multiple relationship of such a large number. When the three little girls made a mistake and returned to the starting point of 0, the whole class gave him warm applause, as if they were jumping not only the three students, but all the little shells.
Step 2 run in circles
This is Shelly's favorite game: two tangent circles, each with the same number of points, two people running laps at the same time, reaching the tangent point and counting loudly. At the same time, the small shell outside the circle is described by multiple relation: 0 times of 65438+6 and 2 times of 6. ...
0 times of 65438+6-6; 12-2 times; 18-6 times; Four times that of 24-6 ... No matter the students who walk in circles or those outside circles, they carefully count every step in their hearts to avoid making mistakes in high-five.
In this way, we completed the 8-9 multiplication formula in the game.
3. Different lap games
In the running circle game we used to play, the number of pieces in the two circles was the same, but this time the teacher gave the small shell two circles with different numbers: one circle had six pieces and one circle had seven pieces.
Two groups of small shells have tried. They set out at the same time and walked forward at the same pace, but they couldn't meet at the tangent point and high-five. It seems that we have to stop and think about what is going on.
You walk around with a 6, but I walk around with a 7 ... big problem! Starting from the same point, if we can clap our hands at the cut, we must take the same number of steps.
Haha, I know! A six-point man walked seven times, so he walked 42 points in one * * *; Let a seven-point man walk six times, and he can walk 42 points, then they will certainly be able to high-five.
The children tried, and it really succeeded! In the past, we used to communicate the relationship between 6×7 and 7×6 with the number axis and matrix diagram. Today, we still use this relationship in such an interesting game. Math is simply wonderful.
4. Multiplication story
After learning multiplication from 6 to 9 years old, children's understanding of multiplication is more flexible, and the multiplication tools available in their minds are more diverse. We began to try to make up interesting mathematical stories for multiplication formulas!
Did you find that this story creation is different from the previous one? We began to play story games of multiplication, addition, multiplication and subtraction. With the constant change of bookshelf model, children can play many different new tricks.
Our multiplication game is not over yet. On Christmas Eve, the multiplication formula will be posted on the wall together with next year's Christmas wishes. I hope Santa Claus can see our mathematical thinking and New Year's expectations that night.
Dice may also be related to multiplication. What is the result of multiplying two numbers thrown by dodecahedron and hexahedron dice? Could it be, could it be a small shell?
Seeing their amazing homework feedback, I'm sure you haven't been cheated!
Only when I saw my parents' feedback did I know that many small shells actually felt too simple, and now they are blocking themselves!
Wow! I am really happy to see you in pain and happy!
What about after multiplication Small shells will say in unison: it's time to learn division! You are really looking forward to learning division, but it's winter vacation. Let's continue next semester!