Question

In recent year a letter to Europe from the United States cost $0.94 to mail. A letter mailed within United States cost $0.44. Nancy mailed 5 letters for $3.70 some to Europe and some to the United States. how many letters did she send to Europe

Answer 1

3 letters to US = 3*0.94 = 2.82
2 local letters = 2*0.44 =  0.88 
checking: 2.82+0.88 = 3.70

to get rid out of 0.04 cents you have to multiply it by 5. so total number of letters would be 5.