Question

(25 x 9) + (75 x 9) =

Answer 1

Multipliers of 75 are 25 and 3. Then

$(25 * 9) + (75 * 9) =(25 * 9) + (25*3* 9)=...$

|Take a common part out the brackets|

$...=(25*9)(1+3) = 25*9*4 = ...$

|We use that $25 * 4 = 100$|

$...=100*9=900$ .

So, the complete solution is

$(25 * 9) + (75 * 9) =(25 * 9) + (25*3* 9)=(25*9)(1+3) = 25*9*4 =100*9=900.$

Answer: $(25 * 9) + (75 * 9) =900$ .