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Good evening, could you please help me with this exercise: We consider the following number A:
A = 12345678912352 -1234567891237 X 1234567891233
1) If we perform A on the calculator, we will find 0 or a value very close to 0 (try it out).
Prove by reasoning on the units digits that A cannot be zero.
2) Calculate A (by hand, so…)
Of course, we will not pose the operations, we will find a trick for example by calling x the number
12345678912235 and expressing A in terms of x



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