4 6 9 13 18 24 31 39 ...... Add 2 to 4 to get 6 then add 3 to 6 to get 9 then add 4 to 9 to get 13 and so on.
we will add -3 :)
Add -3 to 9 because 9+(-3) = 6 Alternatively add s to the Roman numeral of ix which is 9 which then becomes six.
15
-3
You need to add 6 - (-9) = 6 + 9 = 15.
You will add -3 to 9 to make it 6.
9 - (-6) = 9 + 6 = 15
4 6 9 13 18 24 31 39 ...... Add 2 to 4 to get 6 then add 3 to 6 to get 9 then add 4 to 9 to get 13 and so on.
we will add -3 :)
12+9=21 21+15=36 36+13=49 49+6=55
6 x 6 = 36, add 3+6 = 9
Add -3 to 9 because 9+(-3) = 6 Alternatively add s to the Roman numeral of ix which is 9 which then becomes six.
-3
15
-3
9. -6+6=0 0+3=3 therefore -6+9=3