DK how to be a maths whizz ask discover do stem如何成为数学天才 问、探索、实践

How this book works In How to be a Maths Whizz, you will learn how to think and act like a mathematician. The book is packed with fun activities, important topics, and people who have used their maths skills to do amazing things.
这本书是如何成为一个数学天才的，你将学会如何像数学家一样思考和行动。这本书充满了有趣的活动，重要的话题，以及那些用他们的数学技能做了惊人事情的人。

Awesome activities Learn on the job with the activities throughout this book, which show key ideas within maths. There are also crafts to make maths devices, such as an abacus, and memory aids that help you remember important facts.
很棒的活动在工作中学习贯穿这本书的活动，其中显示了数学的关键思想。也有手工制作的数学设备，如算盘，和记忆辅助工具，帮助你记住重要的事实。

Safety first All of the projects in this book should be done with care. If you see this symbol at the top of a page, it means that you will need an adult to help you with the activity.
安全第一本书中的所有项目都应该小心进行。如果你在页面顶部看到这个符号，这意味着你需要一个成年人来帮助你完成这个活动。

Getting ready You can do many of the activities in this book straight away. Rummage around at home to see if you can gather the items you need. Here are instructions on how to use some of the most important maths tools you’ll need.
准备好后，你可以马上完成本书中的许多活动。在家里到处翻找，看看你能不能找到你需要的东西。以下是一些你需要的最重要的数学工具的使用说明。

Calculators Calculators help us to work out sums quickly. To use one, press the buttons that show the numbers and symbols in a sum, in order. Then, press the “=” button to show the answer.
计算器帮助我们快速算出总数。要使用一个，请按按顺序按总和显示数字和符号的按钮。然后，按“=”按钮显示答案。

Edible maths
可食用数学
If you look closely, there’s maths involved with how food looks, the way it’s made, and in sharing it out. From making recipes to describing the shape of your favourite snack, learn to see the maths behind the food on your plate.
如果你仔细观察，就会发现数学与食物的外观、制作方式以及分享有关。从制作食谱到描述你最喜欢的零食的形状，学会了解你盘子里食物背后的数学知识。

Counting You’ve probably been counting since you were little. It’s a simple way of finding how many of something you have.
你可能从小就开始数了。这是一个简单的方法来发现你有多少东西。
Everyday life is full of counting. If you want to give each of your friends an orange, you’d count the oranges up. You’d need to count a lot more pieces of food if you were giving one to everybody in your school!
每天的生活都充满了计算。如果你想给你的每个朋友一个橘子，你就把橘子数起来。如果你给学校里的每个人一份食物，你就需要数更多的食物！

Rotating starfish Rotate this book and you can see it change position. However, some shapes look the same when they’re rotated. They have what we call “rotational symmetry”.
旋转海星旋转这本书，你可以看到它改变位置。但是，有些形状在旋转时看起来是一样的。它们具有我们所说的“旋转对称性”。
The number of positions in which a shape looks the same are called its order of rotational symmetry.
形状看起来相同的位置的数量称为旋转对称顺序。

Imagine a 3D shape unfolding into a flat shape. This is called the shape’s net. Use the nets on pages 62–65 to make building blocks for your own city.
想象一个三维形状展开成一个平面形状。这就是形状的网。使用第62-65页上的网来为你自己的城市做积木。
You could make all the differently shaped buildings you see in a real city – including homes, schools, museums, and much more!
你可以在一个真实的城市里建造所有不同形状的建筑——包括住宅、学校、博物馆等等！

Buildings From your own home to churches and museums, buildings of all shapes and sizes are everywhere you look. Architects, who come up with ideas for buildings,
从你自己的家到教堂和博物馆，各种形状和大小的建筑随处可见。建筑师，他们提出了建筑的想法，
use measurements and shapes to design them. Maths is also what holds a building up! The strength and size of each part has to be worked out.
使用尺寸和形状来设计它们。数学也是支撑建筑的东西！必须计算出每个零件的强度和尺寸。

Aroundthe world The shape of a building or bridge can be linked to a place or a period in history. Ancient Roman buildings often feature arches.
在世界各地，建筑物或桥梁的形状可以与一个地方或一个历史时期联系在一起。古罗马建筑通常有拱门。
Religious buildings can also have distinct shapes. Christian churches often sport pointed cones called spires, and Muslim mosques can have towers called minarets.
宗教建筑也可以有不同的形状。基督教教堂通常有尖塔，穆斯林清真寺也有尖塔。

Division Splitting things into equal amounts is called division. The number you divide by is the number of equal parts you are splitting something into. So if you divide something by three, you’re breaking it into three equal amounts.
把事物分成相等数量的除法叫做除法。你除以的数字是你将某物分成相等部分的数目。所以如果你把一个东西除以三，你就把它分成三个相等的量。

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