選單
（multi-是多個的意思，-ply有摺的意思）
Two multiplied by five equals ten.
二乘五等於十。
注意：這邊multiply要用被動式（二被五乘），並加上介系詞「by」哦！
If you multiply seven by five, you’ll get thirty-five.
如果你把七和五相乘，會得到三十五。
Tom learned to multiply when he was five.
湯姆在五歲時學會乘法。
Three times three is nine.
三乘三是九。
The area of a rectangle is its height times its width.
長方形的面積為長乘寬。除了「乘」之外，「times」還有幾「倍」的意思。
Andy’s girlfriend has twenty of shoes, which is five times as many as Andy.
安迪女朋友有二十雙鞋子，是安迪的五倍。
Ten divided by two makes five.
十除以二等於五。
注意：這邊divide要用被動式（十被二除），並加上介系詞「by」哦！
If you divide 10 by 3 , the remainder is 1.
如果你把十除以三，會得到餘數一。
注意：小數點後數字分開念。
3.14159 three point one four one five nine
注意：分母要用序數。
1/2 one-half/a-half
1/3 one-third
2/3 two-thirds（分子不是1時，序數用複數)
3/4 three-quarters
3/5 three-fifths
13/353 thirteen over three hundred and fifty three（分母太長改用over）
15% fifteen percent
0.3% zero point three percent
12.05% twelve point zero five percent
A: Oh no, I failed my math exam. My mom is going to kill me.
噢不，我數學考試不及格，我媽一定會殺了我。
B: Come on! It’s not the end of the world. Besides, I can help you. I’m quite good at math.
拜託，又不是世界末日。更何況我可以教你啊！我數學還不錯。
A: Oh Max, you are so kind. Could you teach me how to do division?
麥克斯，你人真好。你可以教我除法嗎？
B: Sure, ten divided by two makes five. You can imagine that ten cakes have to be distributed to two people; therefore, each of them will get five.
當然，十除以二等於五。你可以想像有十塊蛋糕要分給兩個人，這樣一個人可以分到五塊。
A: Wow, that would be much easier. Wait, I also got some problems with multiplication. What is eight times three?
哇，這樣簡單多了。等等，乘法我也有些問題。八乘三是多少？
B: That would be twenty-four.
二十四。
A: Okay, last question. How to calculate the area of a circle?
好，最後一個問題。圓的面積怎麼計算？
B: It’s its radius squared times three point one four(3.14).
圓的半徑平方乘以3.14。
A: Thanks! You really help me a lot.
謝謝！你真的幫了我很大的忙。
原來用英文念數字和數學符號也是一門大學問呢！學會之後就不用擔心講數字會結結巴巴了！
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