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কোনটো পূৰ্ণসংখ্যাই খালী ঠাই পূৰণ কৰে: ___ + (−18) = −31?

A49
B13
C−49
D−13
Answer & Solution
Correct answer: D. −13
−31 ত 18 যোগ কৰিলে অনুপস্থিত পূৰ্ণসংখ্যা −13 পোৱা যায়।
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