I am not sure my answers is right or not but i did this
Show the number as ABC
Reverse them, you get CBA where,
A. = hundred
B. - tens
C. = Units
So,
Hundreds Tens Units
A B C
C B A
SUBTRACT A – C O C – A
Subtract 1 hundred, add 9 tens and 10 ones
(-100, +90, +10 – 0)
Hundreds Tens Units
A – 1 B+ 9 C + 10
C B A
Subtract A- 1- C 9 10 + C – A
Reverse the answers and add,
Hundreds Tens Units
A – 1 – C 9 10 + C – A
10 + C – A 9 A – 1 – C
ADD, 9 18 9
SIMPLIFY, 10 8 9
So, we have the answer 1098. Hence, this is the sum we get no matter what number you add and subtract.
summen av tallene blir den samme
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