... lay) 10 . (to lie) 11 . (little) 12 . (a little) 13 . (than) 14 . (then) 15 . (who) 16 . (whom) exercise 25-3Some Important Contrasts 13 106 (099 -13 2B) Units 20-25 11 /3/04 1: 42 PM Page 13 1Common ... words. 1. 5 ϩ 7 ϭ 12 2. 11 Ϫ 6 ϭ 53. 345 Ϫ 220 ϭ 12 54. 22 ϫ 10 ϭ 2205. 10 0 ϫ 63 ϭ 6,3006. 10 ,000 ր 500 ϭ 2007. 880 ϫ 3 ϭ 2,6408. 88,000 Ϫ 55,000 ϭ 33,0009. 11 .5 ϫ 10 ϭ 11 5 10 . 93.3 ր 3 ϭ 31. 1exercise ... 93.3 ր 3 ϭ 31. 1exercise 24 -1 122 Practice Makes Perfect: English Grammar for ESL Learners 06 (099 -13 2B) Units 20-25 11 /3/04 1: 42 PM Page 12 2 13 5Answer KeyUnit 1 Nouns 1. proper 6. common2. common...