2/5 and 5/6 make them 30 2/5 times 6/6=12/30 5/6 times 5/5=25/30 add 2/5+5/6=12/30+25/30=37/30=30/30+7/30=1 and 7/30
answer is 1 and [tex] \frac{7}{30} [/tex]
17. 2 and 2/3+3 and 1/6= 2+2/3+3+1/6= 2+3+2/3+1/6 2/3 times 2/2=4/6 2+3+4/6+1/6= 5+5/6= 5 and [tex] \frac{5}{6} [/tex] hours
18. 7/8-3/4 3/4 times 2/2=6/8 7/8-6/8=1/8 answer is [tex] \frac{1}{8} [/tex] miles
19. need-has=more need 3 and 1/8-2 and 7/8= 3+1/8-(2+7/8)= 3+1/8-2-7/8= 3-2+1/8-7/8= 1-6/8= 8/8-6/8= 2/8= 1/4 1/4 yd
20. had-served=left 5 and 2/3-2 and 3/4= 5+2/3-(2+3/4)= 5+2/3-2-3/4= 5-2+2/3-3/4= 2/3 times 4/4=8/12, 3/4 times 3/3=9/12 5-2+8/12-9/12 3-1/12= 2+12/12-1/12= 2+11/12= 2 and 11/12
answer is 2 and [tex] \frac{11}{12} [/tex] gallons
16. 1 and [tex] \frac{7}{30} [/tex] pages 17. 5 and [tex] \frac{5}{6} [/tex] hours 18. [tex] \frac{1}{8} [/tex] miles 19. [tex] \frac{1}{4} [/tex] yd 20. 2 and [tex] \frac{11}{12} [/tex] gallons
