Negative Numbers

5. Sum of a negative and a positive number: Use the sign of the larger number and subtract
8. Negative numbers were considered to be _______ by many knowledgeable mathematicians
10. What century was negative numbers first accepted in?
11. An Indian mathematician who wrote an influential book on mathematics and was brought over to Europe
12. Thought of the proportion -1:1= 1:-1
14. Used seven symbols (l,V,X,L,C,D,M) to represent numbers, did not have a way of showing negative numbers
17. A great British logician, wrote about negative numbers
19. Understood how to use negative numbers but struggled with the___.

1. Thought of negative square roots as imaginary numbers
2. Claimed negative numbers are greater than infinity
3. Used a m: to represent negative numbers in his work
4. Wrote the book Arithmetica
6. Used black bar or crossed numbers out to represent negative numbers
7. His studying helped negative numbers to became extremely important and the doubts about negative numbers to disappear
8. Expressed uncertainty about the nature of negative numbers
9. Do to his book the importance of negative numbers became known
13. Stated first rules for addition, subtraction, multiplication, dividing with negative
15. Aided in evolving the study of algebraic equation sinto the study of algebraic systems
16. Was comfortable with negative numbers, thought of negative numbers as debts
18. Completely ignored negative numbers in all of their mathematics