500^3-300^3 =100^3*5^3-100^3*3^3 =100^3(125-27) =1000000*98 =98,000,000 by only mental power, it's possible. You are making matters worse and complicated.
In my head, I have two ways to get to 98 mios, both of them ignore the hundreds (cubic hundreds are a million!)... 2 * (25 + 15 + 9) = 2 * 49 = 98 125 - 27 = 98 Let's see what the "trick" is...
500^3 - 300^3 = ( 100 X 5)^3 - (100 X 3)^3 = (100^3 X 5^3) - (100^3 X 3^3) = 100^3 ( 125 - 27 ) = 98 X 100^3 =98 X (10^2)^3 = 98 X (10^2x3) = 98 X 10^6 = 9.8 X 10^7 ( nombre sous la notation scientifique là on doit s'arrêter parce que nous avons la notation scientifique de notre nombre ( soit 98 millions
500^3-300^3=98,000,000 It’s in my head.
"Math Explorer": why keep it simple when you can keep it complicated?
500^3-300^3
=100^3*5^3-100^3*3^3
=100^3(125-27)
=1000000*98
=98,000,000
by only mental power, it's possible. You are making matters worse and complicated.
Me too - 10 seconds
In my head, I have two ways to get to 98 mios, both of them ignore the hundreds (cubic hundreds are a million!)...
2 * (25 + 15 + 9) = 2 * 49 = 98
125 - 27 = 98
Let's see what the "trick" is...
3:55 my ears hear a "100 million"! Why?
500^3 - 300^3 = ( 100 X 5)^3 - (100 X 3)^3 = (100^3 X 5^3) - (100^3 X 3^3)
= 100^3 ( 125 - 27 ) = 98 X 100^3 =98 X (10^2)^3 = 98 X (10^2x3) = 98 X 10^6
= 9.8 X 10^7 ( nombre sous la notation scientifique
là on doit s'arrêter parce que nous avons la notation scientifique de notre nombre
( soit 98 millions
A Beautiful Olympiad Exponential Trick: 500³ - 300³ =?
500³ - 300³ = (100³)(5³ - 3³) = (125 - 27)(10⁶) = 98(10⁶) = 98000000
Why are telling 200 times of 49, put two zeros in product, and say 2 times of 49.first learn this.
125000000_27000000=98000000
98000000