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কোন পূর্ণসংখ্যাটি শূন্যস্থান পূরণ করে: ___ + (−18) = −31?

A49
B13
C−49
D−13
Answer & Solution
Correct answer: D. −13
−31 এর সাথে 18 যোগ করলে অনুপস্থিত পূর্ণসংখ্যা পাওয়া যায় −13।
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