Question
Download Solution PDFপ্রদত্ত সমীকরণটি সঠিক করতে কোন দুটি চিহ্নের বিনিময় করা উচিত?
117 ÷ 13 + 16 × 540 - 40 = 644
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF1. ÷ এবং +
117 + 13 ÷ 16 × 540 - 40 = 644
⇒ 117 + 0.8125 × 540 - 40 = 644
⇒ 117 + 438.75 - 40 = 644
⇒ 555.75 - 40 = 644
⇒ 515.75 - 40 ≠ 644
2. + এবং ×
117 ÷ 13 × 16 + 540 - 40 = 644
⇒ 9 × 16 + 540 - 40 = 644
⇒ 144 + 540 - 40 = 644
⇒ 684 - 40 = 644
⇒ 644 = 644
3. - এবং +
117 ÷ 13 - 16 × 540 + 40 = 644
⇒ 9 - 8640 + 40 = 644
⇒ 49 - 8640 = 644
⇒ -8591 ≠ 644
4. ÷ এবং -
117 - 13 + 16 × 540 ÷ 40 = 644
⇒ 117 - 13 + 16 × 13.5 = 644
⇒ 117 - 13 + 216 = 644
⇒ 333 - 13 = 644
⇒ 320 ≠ 644
সুতরাং, ‘+ এবং ×’ সঠিক উত্তর।
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