Question
Download Solution PDFনিম্নলিখিত সমীকরণটিকে সঠিক করতে কোন দুটি চিহ্নকে অদলবদল করা প্রয়োজন?
21 + 5 × 2 – 21 ÷ 3 = 12Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত সমীকরণ: 21 + 5 × 2 - 21 ÷ 3 = 12
1) + এবং -
চিহ্ন অদলবদলের পরে
বামদিক = 21 - 5 × 2 + 21 ÷ 3 = 21 - 10 + 7 = 18 ≠ ডানদিক
2) - এবং ÷
চিহ্ন অদলবদলের পরে
বামদিক = 21 + 5 × 2 ÷ 21 - 3 = 21 + 0.476 - 3 = 18. 476 ≠ ডানদিক
3) - এবং ×
চিহ্ন অদলবদলের পরে
বামদিক = 21 + 5 - 2 × 21 ÷ 3 = 21 + 5 - 14 = 12 = ডানদিক
4) × এবং ÷
চিহ্ন অদলবদলের পরে
বামদিক = 21 + 5 ÷ 2 - 21 × 3 = 21 + 2.5 - 63 = - 39.5 ≠ ডানদিক
সুতরাং, "- এবং ×" হল সঠিক উত্তর।Last updated on Jun 12, 2025
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