Page 22 - 新思维数学学生用书4 样章

1.3 Understanding place value

7 If you multiply 606 by 10, what changes and what stays the same?

Discuss your answer with your partner.

Think like a mathematician

Digital sum
The digits in the number 15 total 6 (1 + 5 = 6).

a Find all the whole numbers that have digits with a total of 6.

Do not include zero in any of your numbers.

b What is the largest number?

c What is the smallest number?

You will show you are specialising when you find whole numbers that
have digits with a total of 6.

Compare your solution with your partner’s solution.
Did you get the same answer? Did you use the same method?

Did you find all the 2-digit numbers, then 3-digit numbers and so on?

How could you improve your method?

Look what I can do!

I can read and write whole numbers greater than 1000.
I can say the value of each digit in any whole number.

I can multiply and divide a whole number by 10 and 100.

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