Whole Number Worksheets Stage 3. The option Switch addends randomly switches the order of the numbers to be added. They are designed as input/output boxes.

Children making errors in rounding usually need to step back and work on place value.
This page has printables for ordering and comparing triple-digit numbers.
The teacher randomly chooses a card and asks a student to hang the card in its approximate position on the number line. The latter is much easy compared to the former multiplication. Rounding numbers makes them simpler to use.