Page 10 - 新思维数学学生用书5 样章
P. 10
1 The number system
Place value is important because it helps you understand the meaning of a number.
You need place value to understand the order of numbers. If someone offers you 30
dollars or 300 dollars, you need to know that 300 is more than 30.
When you go shopping you will see lots of price labels.
What do these labels have in common?
€1. 00 $1. 49 ¥0. 99 £2. 99
In this unit you will learn more about decimal numbers. Look at the examples in
these pictures and talk with your partner about where you have seen decimal
numbers.
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