This Fractions (upper elem) - b/w Mini Office is perfect to practice fraction skills. Your elementary grade students will love this Fractions (upper elem) - b/w Mini Office. Four pages of materials for a fraction-themed mini office: greatest common factor & least common denominator; finding equivalents; reducing, adding, subtracting, multiplying, and dividing fractions; converting improper fractions to mixed numbers; clever mnemonic devices.