Mrs. T's class collected 458 dollars and Mr. Y's class collected 374 dollars. To find the total amount collected, add the amounts: 1) Add the hundreds places: 458 has 4 hundreds and 374 has 3 hundreds, so 4 + 3 is 7 hundreds or 700 2) Add the tens places: 458 has 5 tens and 374 has 7 tens, so 5 + 7 is 12 tens or 120 3) Add the ones places: 458 has 8 ones and 374 has 4 ones, so 8 + 4 is 12 ones 4) Add all the places: 700 + 120 + 12 is 832