Question 4
Fractions, Decimals and Approximation3.22 − 1.82 equals
- A.7
- B.2.56
- C.13.48
- D.2.0
Show the answer and explanation
Answer: A (7)
Explanation
Difference of two squares: (3.2 + 1.8)(3.2 − 1.8) = 5 × 1.4 = 7.
3.22 − 1.82 equals
Answer: A (7)
Difference of two squares: (3.2 + 1.8)(3.2 − 1.8) = 5 × 1.4 = 7.