Encrichment of Addition Operation on Decimal Fraction

from numeral 3, 4, 6, 8, and 9 are made numbers of two decimals with each numeral is used once. determine the diffrence between the highest number and the smallest number

Exercise of Addition Operation on Decimal fraction

the distance between City A and City B is 189,75 km. while the distance between city B and city C is 157,234 km. how is the distance between A and city C if must be through the city B?