Page 18 - 新思维数学学生用书2 样章

1.2 Counting up to 100 objects

Compare with a partner how you each worked out

the missing numbers in question 6.
What did you do the same?

What did you do differently?

Look what I can do!

• I can say, read and write numbers from 0 to 100.

• I can say and represent the value of each digit

in a 2-digit number.

• I can count on and back in steps of 1 and 10 from

any number, using the 100 square for support.

1.2 Counting up to 100 objects

We are going to ...

• represent 2-digit numbers in tens and ones

• estimate how many objects there are then count to check

• count on and back in ones, twos and tens.

Now that you know the order of the accurate, accurately

numbers to 100, you can use them to collection order

estimate how many objects there are

and count them.

Counting in tens helps you to count larger collections

quickly and accurately.

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