What is 324 plus 586?

1. Add the ones column: 4 + 6 = 10, so write 0 and carry 1 ten to the tens column. 2. Add the tens column: 1 (carried) + 2 + 8 = 11, so write 1 and carry 1 hundred to the hundreds column. 3. Add the hundreds column: 1 (carried) + 3 + 5 = 9. 4. Reading the columns gives 910, so 324 + 586 = 910. 5. 900 comes from forgetting to carry the ten from the ones column, and 920 comes from a slip in the tens column. _Source: OpenStax Prealgebra (CC BY 4.0), Ch 1 "Whole Numbers", section 1.2 Add Whole Numbers_