It is WRONG thinking. Math isn't about how much formula that has to remember but Math is about how to train your passion to do exercises much more than before.
Pardon me? You don't have passion in Math?? :D LOL!! It's just your excuse and actually you include with Lazybones of Math . :D
You don't have passion in Math because you judge Math so difficult, You judge Math like that because you don't know how to learn Math by right way, You don't know how to learn Math by right way because you are so lazy to start to do some exercise on your spare time.
But WHATEVER YOU ARE, if you want to give a chance to your self to start to learn Math more so that your math will be increased, PLEASE forget all "yellow" sentences. LET WE START to move from your bad Math to Amazing Math.
Ok, I will give you some question, you can do this more than once. Maybe at the first time you can do it while looking examples and at the second time you can re-write your work while looking to your first work and at the last time you can do the exercise without anything (the example or your first work).
*Exercise 1
#Example 2
53 + 22 = ...
Answer :
*Exercise 2
#Example 3
53 + 22 = ...
Answer :
#Example 10
167 + 125 = ...
Asnwer :

*Exercise 10
#Example 11
467 + 145 = ...
Answer :

*Exercise 11
#Example 12
467 + 745 = ...
Answer :

*Exercise 12
You don't have passion in Math because you judge Math so difficult, You judge Math like that because you don't know how to learn Math by right way, You don't know how to learn Math by right way because you are so lazy to start to do some exercise on your spare time.
But WHATEVER YOU ARE, if you want to give a chance to your self to start to learn Math more so that your math will be increased, PLEASE forget all "yellow" sentences. LET WE START to move from your bad Math to Amazing Math.
Ok, I will give you some question, you can do this more than once. Maybe at the first time you can do it while looking examples and at the second time you can re-write your work while looking to your first work and at the last time you can do the exercise without anything (the example or your first work).
1st Level of AL-KHAWARIZMI
*Exercise 1
- 17 + 2 = ...
- 41+ 5 = ...
- 35 + 4 = ...
- 73 + 6 = ...
- 82 + 7 = ...
- 21 + 6 = ...
- 67 + 2 = ...
- 35 + 4 = ...
- 93 + 6 = ...
#Example 2
53 + 22 = ...
Answer :
*Exercise 2
- 78 + 7 = ...
- 56 + 8 = ...
- 53 + 9 = ...
- 87 + 6 = ...
- 65 + 8 = ...
- 69 + 5 = ...
- 46 + 9 = ...
- 29 + 7 = ...
- 34 + 8 = ...
#Example 3
53 + 22 = ...
Answer :
*Exercise 3
- 67 + 22 = ...
- 45 + 35 = ...
- 37 + 21 = ...
- 42 + 27 = ...
- 34 + 25 = ...
- 37 + 11 = ...
- 27 + 72 = ...
- 33 + 25 = ...
- 71 + 27 = ...
*Exercise 5
- 267 + 2 = ...
- 145 + 3 = ...
- 537 + 2 = ...
- 342 + 7 = ...
- 134 + 5 = ...
- 233 + 6 = ...
- 527 + 2 = ...
- 283 + 5 = ...
- 871 + 8 = ...
#Example 6
167 + 5 = ...
Answer :
167 + 5 = ...
Answer :
*Exercise 6
- 178 + 7 = ...
- 156 + 8 = ...
- 353 + 9 = ...
- 487 + 6 = ...
- 765 + 8 = ...
- 269 + 5 = ...
- 246 + 9 = ...
- 629 + 7 = ...
- 734 + 8 = ...
#Example 7
367 + 25 = ...
Answer :
367 + 25 = ...
Answer :
*Exercise 7
- 267 + 28 = ...
- 145 + 36 = ...
- 537 + 29 = ...
- 342 + 48 = ...
- 134 + 57 = ...
- 233 + 56 = ...
- 527 + 29 = ...
- 263 + 59 = ...
- 871 + 19 = ...
#Example 9
467 + 132 = ...
Answer :
467 + 132 = ...
Answer :
*Exercise 9
- 234 + 543 = ...
- 721 + 111 = ...
- 628 + 221 = ...
- 532 + 367 = ...
- 616 + 212 = ...
- 173 + 106 = ...
- 811 + 176 = ...
- 678 + 321 = ...
- 111 + 888 = ...
#Example 10
167 + 125 = ...
Asnwer :
*Exercise 10
- 126 + 327 = ...
- 432 + 148 = ...
- 249 + 217 = ...
- 179 + 117 = ...
- 627 + 356 = ...
- 817 + 169 = ...
- 123 + 567 = ...
- 729 + 259 = ...
- 658 + 223 = ...
#Example 11
467 + 145 = ...
Answer :
*Exercise 11
- 196 + 327 = ...
- 462 + 148 = ...
- 299 + 217 = ...
- 189 + 117 = ...
- 677 + 356 = ...
- 837 + 169 = ...
- 163 + 567 = ...
- 759 + 259 = ...
- 698 + 223 = ...
#Example 12
467 + 745 = ...
Answer :
*Exercise 12
- 796 + 327 = ...
- 462 + 848 = ...
- 999 + 217 = ...
- 989 + 117 = ...
- 677 + 556 = ...
- 837 + 369 = ...
- 763 + 567 = ...
- 759 + 459 = ...
- 698 + 523 = ...