In the case of 54 3 the trick is to realize that 54 24 30. 2 x 4 8. Other skills include rounding numbers and estimating calculations.
Use subdivision to quickly calculate large numbers in your head.
Then multiply those two numbers and then add the square of the. Do you want to be involved with math when you grow up. Other skills include rounding numbers and estimating calculations. If You Can Do 710 Of These Math Problems In Your Head Well Be Impressed.