Page 20 - 新思维数学学生用书4 样章

1.3 Understanding place value

1.3 Understanding place value

We are going to ...

• read and write whole numbers greater than 1000

• say the value of each digit in any whole number and explain how

the position of a digit affects its value

• multiply and divide whole numbers by 10 and 100 and understand
how the digits move

• compose (put together) and decompose (split) numbers.

In this section, you will work with bigger numbers

including thousands, ten thousands and hundred compose

thousands. You will also multiply and divide whole decompose

numbers by 10 and 100. equivalent
hundred thousand

million

place holder

regroup
Worked example 4

Look at the number 829. ten thousand
thousand
a What digit is in the tens place?

b What is the value of the 8 in this number?
Use a place value table to help you.
100s 10s 1s

8 2 9

Answer:

a 2 Remember to write the number of
b eight hundreds (or 800) hundreds.

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