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Evaluate : (i) 35 ÷ 0.07   (ii) 2.5 ÷ 0.0005   (iii) 136.09 ÷ 43.9

  • A.(i)501
    (ii)5000
    (iii)3.2
  • B.(i)600
    (ii)5010
    (iii)2.1
  • C.(i)500
    (ii)5011
    (iii)3.3
  • D.(i)500
    (ii)5000
    (iii)3.1

Answer: D

Clear the decimal from the divisor by multiplying both numbers by the same power of ten, then divide.

(i) \[ \frac{35}{0.07} = \frac{3500}{7} = 500 \]

(ii) \[ \frac{2.5}{0.0005} = \frac{25000}{5} = 5000 \]

(iii) \[ \frac{136.09}{43.9} = \frac{1360.9}{439} \approx 3.1 \]

Dividing by a number smaller than 1 always makes the result larger, which is why the first two answers are so much bigger than the numbers they start from.

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