1) What is the difference between 6 and 10? 2) What is the difference between 8 and 12? 3) What is the difference between 15 and 20? 4) What is the difference between 18 and 17? 5) What is the product of 18 subtract 3? 6) What is the product of 15 subtract 5? 7) What is the product of 20 subtract 10? 8) What is the product of 20 subtract 20? 9) What is the difference between 10 and 20? 10) What is the product of 10 subtract 10? 11) What is the product of 17 subtract 3? 12) What is the product of 10 subtract 1? 13) What is the product of 18 subtract 1?

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