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JAMB Mathematics 2001 Question 3

Question 3

Fractions, Decimals and Approximation

Evaluate 21.05347 − 1.6324 × 0.43, to 3 decimal places.

  1. A.20.351
  2. B.20.352
  3. C.20.980
  4. D.20.981
Show the answer and explanation

Answer: B (20.352)

Explanation

Multiply first: 1.6324 × 0.43 = 0.701932. Then 21.05347 − 0.701932 = 20.351538, which is 20.352 to 3 decimal places.