A three digit number can be divided into three columns:
HUNDREDS | TENS | ONES -----------|--------------|----------------- 7 | 3 | 8 The number 738 is equal to 7 hundreds + 3 tens + 8 ones.
HUNDREDS | TENS | ONES -----------|--------------|----------------- 4 | 2 | 5 The number 425 is equal to 4 hundreds + 2 tens + 5 ones.