162
Two numbers that multiply to give -1 are -1 and 1.
You have to multiply the bottom number by the whole number. then add it to the top number. EX: 1/2+3=7/2
0
Let E1 and E2 be two even numbers. Then (E1+1)(E2+1) will be the product of two odd numbers. We have E1*E2 +E2+E1+1. Now when we add or multiply even numbers, we get even numbers and we add 1, it's odd.
-1
162
1
-1
404
1
They are: -5 and 4
25
-7 and 8
43
33
-- To add one fifth to a number, add 0.2 to it. -- To find a new number that is one fifth bigger than the original number, multiply the original number by 1.2 .