... 31.1exercise 24 -1 122 Practice Makes Perfect: English Grammar for ESL Learners 06 (099-132B) Units 20 -25 11/3/04 1: 42 PM Page 122 135Answer KeyUnit 1 Nouns1. proper 6. common 2. common 7. proper3. ... 12 2. 11 Ϫ 6 ϭ 53. 345 Ϫ 22 0 ϭ 125 4. 22 ϫ 10 ϭ 22 05. 100 ϫ 63 ϭ 6,3006. 10,000 ր 500 ϭ 20 07. 880 ϫ 3 ϭ 2, 6408. 88,000 Ϫ 55,000 ϭ 33,0009. 11.5 ϫ 10 ϭ 11510. 93.3 ր 3 ϭ 31.1exercise 24 -1 122 ... demonstrate thisdifference: 126 Practice Makes Perfect: English Grammar for ESL Learners 06 (099-132B) Units 20 -25 11/3/04 1: 42 PM Page 126 NumbersNumbers are generally used for specifying amounts...