数学之数感：（瑞思数学的三个维度：语言，思维，解决问题）

教学目标：

1. 变换场景应用知识。

2. 学生能够听懂并回答相关场景下的语言。

3. LTP： 团队合作，项目管理，演讲演示。
   

   
   

There are twenty-six birds in these trees.

Drag groups of ten blocks here to show the greatest number of groups of ten in twenty-six.

And drag blocks here to show the number of ones left over.

When you are done, click ok.

That’s it.

These blocks shows the greatest number of groups of ten in twenty-six

and the number of ones left over.

On number chart we can see that twenty is made up of two groups of tens

and thirty is made up of three groups of ten.

So the greatest number of groups of ten in twenty-six is two and there are one, two , three, four, five, six left over.

Here are thirty-four cherries.

What is the greatest number of groups of ten in thirty-four

and the number of ones left over.

Drag numbers here and here.

When you are done, click ok.

That’s right.

The greatest number of groups of ten in thirty-four is three

And there are four ones left over.

One, two, three groups of ten.

And one, two, three, four ones left over.

The greatest number of groups of ten in thirty-four is three.

And there are four ones left over.

Here are sixty three cookies. 

We can write sixty-three as one group of ten and fifty-three left over.

Click on this button to see other ways of writing sixty-three as groups of ten and ones left over.

Sixty-three is equal to two groups of ten and forty-three left over.

Sixty-three is equal to three groups of ten and thirty-three left over.

Sixty-three is equal to four groups of ten and twenty-three left over.

Sixty-three is equal to five groups of ten and thirteen left over.

Sixty-three is equal to six groups of ten and three left over.

Which of these groups of marbles shows the number thirty-five.

Click on the group of marbles.

When you are done, click ok.

That’s right.

This groups of marbles shows the number thirty-five.

One group of ten and fifteen left over is equal to ten, fifteen, twenty, twenty-five.

So this group of marbles shows the number twenty-five.

Two groups of ten and fifteen left over is equal to ten, twenty, twenty-five, thirty, thirty-five.

So this group of marbles shows the number thirty-five.

We use blocks to count the numbers of rabbits that jumped into the hole.

There are thirty-nine rabbits jumped into the hole.

There are three groups of ten and nine left over in the number thirty-nine.