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Per NCERT §1.3.3, in 12.9 g − 7.06 g (each to 3 significant figures), the result must be reported as which?
A5.84 g
B5.8 g
C6 g
D5.840 g
Answer & Solution
Correct answer: B. 5.8 g
NCERT §1.3.3: subtraction is decimal-place limited; 12.9 has 1 dp, so result has 1 dp → 5.8 g.
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