3rd Grade Rounding numbers Worksheets

Third graders should round whole numbers to the nearest 10 and the nearest 100 (CCSS 3.NBT.A.1). They should understand that rounding means finding the closest benchmark number and that the midpoint (like 5 in the ones place or 50 in the tens place) rounds up by convention. Students should apply rounding to estimate sums and differences before computing exact answers. They should also explain their rounding using a number line or place value reasoning, not just follow a memorized rule. Worksheets that present rounding problems alongside number lines, then gradually remove the visual support, help children transition from concrete understanding to mental rounding. Practice with both "round to the nearest 10" and "round to the nearest 100" using the same number builds flexibility.