What is 9+10

Question

My dad told me that i am stupid and i said no i nat and he asked me what is 9+10?

Answer 1

Let's look at a number line.

 

 

7    8     9   10   11    12   13   14   15    16   17    18   19    20   21   22    23

|----|----|----|----|-----|----|----|----|-----|----|-----|----|-----|----|----|-----|

 

Starting at ten, we jump nine spots

                    0----1-----2-----3----4-----5----6----7----8----9

And we reach nineteen.

 

We can also try a number box:

1     2     3     4     5     6      7      8      9    10

11  12  13    14   15   16   17    18   19    20

21  22  23    24   25   26   27    28   29    30

 

Once again, if we start at 10, we make one jump to eleven, the second to twelve, and keep going until we make a total of nine jumps to nineteen.