Alex wrote 103.903 in expanded form as 100+3x1+9x1/100+3x1/1000. Explain his mistake. Then tell how to correct it.

Here is the mistake is on 9x1/100 because after decimal 9 is there means

9 has to be multiplied by 1/10 to get the 0.9

Here if we expand the 103.903 then from left to right

1 = 1x100 +

0 = 0x10 +

3 = 3x1 +

9 = 9x1/10+

0 = 0x1/100+

3 = 3x1/1000 = 103.903