45. निम्नलिखित व्यंजक का (पूर्ण संख्या में) निकटतम मान ज्ञात कीजिए: 349 x 51 +(632-31) (A) 17522 (B) 17520 (C) 17821 (D) 17521 कच्चे कार्य
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Given : 349 x 51 +(632÷31)
To Find : (पूर्ण संख्या में) निकटतम मान
Solution:
349 x 51 +(632÷31)
349 x 51 = 350 * 50 = 17500
(632÷31) = 600 / 30 = 20
Hence 349 x 51 +(632÷31)
= 17500 + 20
= 17520
Hence (पूर्ण संख्या में) निकटतम मान = 17520
Estimated value of 349 x 51 +(632÷31) = 17520
Exact calculation :
632÷31
= (620 + 12) ÷31
=(620÷31 ) + (12 ÷31)
= 20 + (12 ÷31)
≈ 20 as 12 ÷31 < 0.5
349 x 51
= (350 - 1) * (50 + 1)
= 350 * 50 - 50 + 350 - 1
= 17500 + 299
= 17799
17799 + 20
= 17,819
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