Choose all decimals that are equivalent to (9 × 100) + (2 ×10) + (3 × 110) + (5 × 1100).

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

a 270° rotation about point p says on e d g e n u it y (had to space it out because it says it's a misspelling so i couldn't submit it