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In expanded form it is 20+5.The expanded for is a nice way to break up a number to show how much each digit represents. In the example above it shows we have 2 tens and 5 ones.
An example of how you use expanded notation in addition is 3 x 100 + 9 x 10 + 3. The standard notation for the previous example is 393. Expanded notation is shown by showing the sum of each digit multiplied by its place value (hundreds, thousands, tens, and so forth).
An example of place value expanded notation is to expand the number 4985 to 4000 plus 900 plus 80 plus 5. The expanded notation gives one the place value of 4 in the thousands place, 9 in the hundreds place, 8 in the tens place, and 5 in the ones place.
608 in expanded form= 600+8 example: 46729= 40000+6000+700+20+9
a different way to right numbers for example 245 in expanded form is (2 times 100) plus (4 times 10) plus (5 times 1)