One example might be if you want to multiply somthing in your head. It can be easier to split the number into its components, ie (45 x 12) becomes (40+5) x (10+2) so from here you expand out and it becomes (400+80+50+10) which is 540. It can help in doing stuff in your head.
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they aren't used in real life, not unless you need them in a situation were you would need to use them.
Expanded Form means you expand the whole equation 12*12*12 Exponential Notaion means you need a base (12) and an exponent (3) 12^3 Standard Form is the answer you get from solving the problem 1728
To write a number in expanded form we first need to divide it by a power of 10 so that the greatest digit is the units (it is currently the tenths) In this case, you can divide by 0.1 to get 4.92 0.1 is the negative oneth power of ten, or 10-1. This needs to be written alongside 4.92 as a multiplication. Thus, the expanded form of 0.492 is 4.92x10-1 * * * * * I believe that the above is the correct answer but for the scientific form. The expanded form is 4*10-1 + 9*10-2 + 2*10-3 or 4/10 + 9/100 + 2/1000
The need of numbers in everyday life is obvious. When you purchase something, who will count all the money? That is just one of the many answers there are.
Expanded form (50,000+300+70+2) need answer in standard form