How to Add ( 2-digit + 2-digit with regrouping):

Question :  Add 64 + 37  or  

STEP 1   –  Add the ONES (and if the sum is more than 9 , then regroup 10 ONES as 1 TEN and carry it to the TENS column)

STEP 2  –  Add the TENS , (and if the sum is more than 9 , then regroup 10 TENS as 1 HUNDRED and carry it to the HUNDRED column)

so the answer will be 

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