第一单元

Unit-one

Ancient tree in Taishan -- calculator

泰山古树——计算器

Looking at the statistical information, what questions can you ask?

观察统计表信息，你能提出什么问题？

1. How many ancient trees are there in Red Gate, Zhongtian Gate and South Tianmen?

1. 红门、中天门和南天门一共有多少棵古树？

Three thousand four hundred and forty-nine plus five hundred and twenty-seven plus one thousand six hundred and forty equals

3449+527+1640=——（棵）

Complex calculations can be done with the help of a calculator

复杂的计算可以借助计算器。

Calculator is a kind of calculation tool which is fast and easy to operate.

计算器是一种运算快、操作简便的计算工具。

Calculating steps with a calculator:

用计算器计算的步骤：

Press ON button to boot

开机按ON键

Press 3449 in turn

依次按3449键

Press the plus sign

按+键

Press 527 one by one

依次按527键

Press the plus sign

按+键

Press 1640 in turn

依次按1640键

Press the = key to display the results

按=键显示结果

If you want to clear the screen, press AC key, and press OFF key to power OFF

如果要清屏按AC键，要关机按OFF键

The number of ancient trees in Lingyan Temple is several times that of Daimiao.

2. 灵岩寺古树的数量是岱庙的几倍？

Ten thousand eight hundred and ninety-one divided by two hundred and fifty

10891÷250=

Can you calculate three thousand minus one hundred twenty-eight times six with a calculator?

你会用计算器计算3000-128×6吗？

3. Use a calculator to calculate the following questions. What can you find?

3. 用计算器计算下面各题，你能发现什么？

Nine thousand nine hundred ninety-nine times eleven is

9999✖11=——   

Nine thousand nine hundred ninety-nine times twelve is

 9999✖12=——

Nine thousand nine hundred ninety-nine times thirteen is

9999✖13=——  

Nine thousand nine hundred ninety-nine times fourteen equals

9999✖14=——