This Problem Set is a part of the Lesson 33, Unit 5, Grade 4. In this lesson, students subtract a mixed number from a mixed number by counting up with the use of a number line. Students also subtract a mixed number from a mixed number by first subtracting the whole numbers and then using a number bond to decompose the subtrahend when there are not enough fractional units in the minuend. Finally, use a number bond to decompose the minuend into fractional parts when subtracting a mixed number from a mixed number that does not have enough fractional units.