Problems 47-59
See Example 4, and keep in mind changing number bases.
Problem 47 and 57: weeks and days write 12 base seven to mean one week and two days.
Problem 48 and 59: days and hours write 12 base twenty-four to mean one day and two hours.
Problem 49: feet and inches write 12 base twelve to mean one foot and two inches.
Problem 50: pounds and ounces write 12 base sixteen to mean one pound and two ounces.
Problem 51 and 55: gross, dozens, and units write 123 base 12 to mean one gross, two dozen, and 3 units.
Problems 52-54 and 56: quarters, nickels, and pennies write 123 base one quarter, two nickels, and 3 pennies.
Problem 58: years and months write 12 base twelve to mean one year and two months.
Note: Homework Hints are given only for the levels 1 and 2 problems.