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9
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Across 4. mean 5. any integer which divides evenly into another integer 8. difference between the largest and the smallest 9. a mathmatical sentence built from expressions and using equal sign(s) 10. identical in shape and size 14. any four sided figure 15. the result of subtracting two numbers 16. identical in shape although not necessarily the same size 18. the first place after the decimal point 20. number in the middle

Down 1. a five sided figure 2. the result of multiplication 3. please excuse my dear aunt sally (3 words) 6. a rectangular arrangement of two numbers 7. pair of numbers giving location of a point 11. a mathmatical formula containing number(s) and variable(s) 12. the product of a number and any other number 13. a ratio of numbers, such as 1/2 or 2/5 17. number that appears the most 19. the result of addition