Add Left to Right

47
+ 32 (30 + 2)

To solve 47 + 32, first add 30, then add 2. After adding 30, you have the simpler problem 77 + 2. We illustrate this as follows:

47 + 32   =   77 + 2   =   79
(first add 30)    (then add 2)

Notice we are fusing the left most digit of the second number into the first number

Let's try another:

67
+ 28 (20 + 8)

Adding from left to right, you can simplify the problem

67 + 28   =   87 + 8   =   95
(first add 20)    (then add 8)

Let's try a more challenging one:

257
+ 184 (100 + 80 + 4)
257 + 184   =   357 + 80 + 4   =   437 + 4   =   441
(first add 100)    (then add 80)    (then add 4)

It takes some getting used to, notice though how this is quicker then adding the right more digit first.