1 Use the base ten pieces for 398 (9 flats, 3 longs, and 8 units) to divide 338 by 18. Use X for units, shading for longs, and stripes for flats. The first flat and long is shown. You may need to break up flats into longs or longs into units. What is the answer? Find the remainder for this division problem using your calculator | 148,829 - 521 3. (extra credit) Simplify this expression: 5 18 (6- 1)- -2(8 : 1)4