Free Printable Number and Operations in Base Ten Worksheets for Class 3

In 3rd grade, students solidify their skills by fluently adding and subtracting within 1,000. They are also introduced to two new, critical concepts: rounding whole numbers to the nearest 10 and 100, and multiplying one-digit numbers by multiples of 10 (e.g., 3 x 40).

A number line is the most effective visual tool for teaching rounding. To round 67 to the nearest ten, have students place it on a number line and visually determine whether it is closer to 60 or 70. This concrete representation helps them internalize the concept before memorizing rules.

A common misconception is looking at the wrong digit. When rounding a number like 348 to the nearest ten, a student might focus on the '4' in the tens place instead of looking to its right at the '8' to decide whether to round up or down.

These worksheets provide extensive practice with the standard algorithm for addition and subtraction. The problems include multiple regroupings, such as borrowing across a zero, to ensure students can handle complex, multi-step calculations confidently.

You can assign them as a printable PDF for focused, offline practice, which also helps schools reduce student screen time. Every worksheet includes a complete answer key, and you can grade paper submissions quickly using the Wayground for Teachers app to scan and score student work.

They are closely aligned with the Grade 3 Common Core NBT domain. The worksheets provide practice for using place value to perform multi-digit arithmetic, with a specific focus on the new skills of rounding and multiplying one-digit whole numbers by multiples of 10.