e 357 210 > 357 201 f 404 404 < 440 044 g 658 243 > 658 234 h 898 989 < 989 898 i 999 999 > 99 999


Do you remember the following properties of numbers? • When you add 0 to or subtract 0 from a number, it stays the same.


• When you subtract a number from itself, you get 0. • When you add and subtract the same number, you get back to the number you started with.


• Numbers can be added in any order. • Numbers cannot be subtracted in any order. • You can use flow diagrams to show: • that division undoes multiplication and that multiplication undoes division


• that numbers can be multiplied in any order


• When you multiply a number by 1, it stays the same. • When you multiply and divide by the same number, you get back the number you started with.


• You can multiply numbers in any order. • When you divide a number by 1 it stays the same. • When you divide a number by itself you get 1. • Numbers cannot be divided in any order.


Unit 2.1 Summary


• In a 6-digit whole number, the first digit shows hundred thousands, the second ten thousands, the third thousands, the fourth hundreds, the fifth tens and the sixth units.


• The symbols for comparing numbers are: < (is less than); = (is equal to); > (is more than).


94 Term 2


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