3.NBT Worksheets, Workbooks, Lesson Plans, and Games

Looking for a worksheet to help your kid with number rounding skills? This printable will help him with third grade math skills.

Time for a numbers round-up! Rounding and estimation are important math concepts that will help boost your child's mental math skills.

In this practice worksheet, students solve 15 three-digit subtraction problems with regrouping.

This fun math worksheet gets kids to solve a tricky riddle while they practice addition and subtraction. Find out why lobsters don't share with this worksheet.

Help your students apply strategies when solving addition problems. This worksheet provides practice for using number lines to solve addition problems with three-digit numbers.

Kids practice rounding to the nearest ten, hundred, and to the place value underlined on this math worksheet.

Adding big numbers can be tricky, but this lesson introduces your students to a strategy that makes it less intimidating! Using the place value strategy will make the task less daunting.

Start your students on subtracting three-digit numbers with this lesson that breaks the problems down by place values!

It's rounding time. Help young mathematicians learn to round to the nearest ten and hundred with this teacher-approved lesson.

One million is a hard number for young children to grasp. This lesson will help students understand how large of a number one million is and what is represents.

Expand on your students' knowledge of base ten numbers with this lesson that introduces the students to the place and value of digits within a number.

Help your students understand rounding without rhymes or tricks. Students will use an open number line to round and then take part in a fun game that will get them moving around the room.

Brush up on addition and subtraction with these math worksheets that will challenge your third grader.

Improve your pattern-recognition and estimation skills as you practice multiplication and division. Children use techniques like breaking down numbers and fast addition to arrive at the correct answer — and to understand the concepts behind the proc

Scale math heights using this workbook that's based on real measurements of U.S. geography. Kids rely on charts and data provided to answer word problems.