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Write an expression that shows how to use the halving and doubling strategy to find 28 x 50

Sagot :

ProjectTerminaidn
28 x 50
halve 28, double 50
14 x 100
easy: 1400

First we have to know that how we can double a number and half a number.

Halving the number means dividing the number by 2 and doubling the number means multiply by 2.


Now the given expression is "28 x 50".


half of the number 28 = 28/2 = 14

and double of the number 50 = 50 x 2 = 100


Now, multiply 14 and 100.


14 x 100 = 1400 answer.


There is one other method also to solve this;


Double of 50 is 100,


so 28 x 100 = 2800


now half of the answer is 2800/2


= 1400


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