Ryan has 59 stickers. Kai has 34 stickers. How many stickers do they have in all?

The correct answer is: 93

Number of stickers Ryan has = 59
Number of stickers Kai has = 34
Total stickers = Partial sum of 59 + 34
To find partial sums add the digits in tens place and ones place seperately.
Partial sum of 59 + 34
Step 1 : Add digits in tens and ones place seperately:
50                                    09
+ 30                   and        + 04

_____                             ______
80                                        13
Thus, Total stickers = the sum of 59 + 34 are 80 + 13 = 93.