Question

Number Sense Can you simplify before multiplying 14 x 25 upon 27
? Explain!
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Answer 1

The answer is approximately 13.

• In number sense, we can use the logic of doubling and halving.
• The given product expression is (14 x 25)/ 27.
• The numerator is 14 x 25.
• We know that 25 is a multiple of 5 and on multiplying with 2 gives 50.
• Thus we half 14, double 25 and finally divide by 27.
• This can be mathematically represented as -

(14 x 25)/ 27

= (7 x 50)/27

= (7 x 5 x 10)/27

= 350/27

=12.96 ≈ 13