0.000456 = 4.56 × 10-4
There must be only one digit to the left of the decimal place,
so an answer like 45.6 × 10-5
is not
in the correct format.
The notation for a negative number has a negative sign in front of the first digit:
-1.38502 × 1003 = -(1.38502 × 1003) = -1385.02
The notation for a small negative number has two negative signs: one to negate the entire number and one (in the exponent) to shift the decimal point left:
-1.38502 × 10-3 = -(1.38502 × 10-3) = -0.00138502
Match the numbers in column I with the scientific notation in column II.