There are several groups of numbers
natural number are counting number,,1,2,3,4,5,6..
whole numbers include 0 as well
integers means negative and positive numbers not including decimals =-6,-5,-4,-3,-2,-1,0,1,2,3,4,5...
so prime number is a number that cannot be factored out using integers. basically a number that the only factors are 1 and itself exg
3 is prime becuase 3=3 times 1
4 is not prime becuase 2 times 2 is 4
7 is prime becuase the only factors are 1 and 7
negative numbers are numbers less than zero
a negative number is like -1,-2,-3,-4,-5,-6,-7,-8,-9,-10...
when added, it's like subtraction exg
add 3 and -2 together=3+(-2)=3-2=1
Well just add them up
2.47 + 8.99 + 6.47 = ???
The answer is $17.93