Numbers are made of digits, a digit is:
Numbers can have two, three, and four digits or even more:
thousands  hundreds  tens  units  digits 
4 
6 
two digits 

2 
5 
3 
three digits 

3 
9 
6 
2 
four digits 
Ordering numbers
The more digits a number has, the higher it is.
To order the numbers faster is easier to use number line:
44 comes before 47 on the number line because is smaller
If you need to put in order two numbers with the same amount of digits then you need to see which one has the highest first digit
428 is bigger then 328
428 is smallest then 482
321 is smaller then 322
Partitioning Numbers
Partitioning is breaking up numbers into hundreds, tens and units:
Example:28= 20+8
273= 200+ 70+3
427= 400+ 20+7
More examples:
427= 300+120+7
258= 200+40+18
845= 600+245
You can even calculate easier this way:
23+66 = > 23= 20 + 3
66= 60 + 6
=>80 + 9 = 89
275 + 314 = > 275= 200 +70 +5
314=300 +10 +4
500+ 80+ 9 = 589
Click to practice partitioning.
Decimal numbers
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