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Quicker Maths : Example 2

Question : 7.5% of 1400 + 4.5% of 3600= ? ÷ 5

so what will be your steps.   will you calculate 7.5x1400/100 or quick multiply 7.5 x14 like this  7x14 + 0.5x14 =98+7=105
be more quick in calculation  multiply 7.5 x14 like  (7.5 x2 x7) will lead to 15 x7 =105

similarly 4.5 x 36= 9x18=18x9= 162

now add 105+162= 267

you have to find 267x5

and you can do it by 267x10/2 = 2670/2 =1375

26/2=13  70/2=35

more division tricks will be discussed in coming examples.

so this question can be solved in maximum 45 seconds and you save a flat 15 second.

if you do it earlier,more seconds are yours .. so enjoy rapid calculation....

 

 
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