(精确到0.01) (1)√7-π+√2 (2)|√5-√7|-2√7

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(精确到0.01) (1)√7-π+√2 (2)|√5-√7|-2√7

(精确到0.01) (1)√7-π+√2 (2)|√5-√7|-2√7
(精确到0.01) (1)√7-π+√2 (2)|√5-√7|-2√7

(精确到0.01) (1)√7-π+√2 (2)|√5-√7|-2√7
(1)√7-π+√2
=2.646 - 3.141 + 1.414
≈0.92
(2)|√5-√7|-2√7
=|2.236 - 2.646| - 2×2.646
= 0.410 - 5.292
≈4.88
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2/7-2π+√11-2=-12/7-2π+√11=-1.71-2*3.14+3.32=-4.67