Round It! Rounding to the Nearest Ten

About This Resource

A free Grade 2 math lesson and worksheet on rounding two-digit numbers to the nearest ten: using a number line, finding the two tens a number sits between, the rule for 5, and rounding in real life. Includes a timed lesson plan, worksheet, editable Word version and answer key.

Overview

Children learn to round a two-digit number to the nearest ten. They find the two tens the number sits between, use a number line to see which ten is closer, and learn that a number ending in 5 rounds up. They round twelve numbers, choose the nearest ten, decide if statements are true or false and use rounding to estimate in everyday situations.

Resource Details

Subject: Math
Topic: Rounding to the Nearest Ten
Category: Number Sense
File Type: PDF
File Size: 225.1 KB
Published: 31 Oct 2026
Downloads: 0

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Grade 2 (ages 7–8) 40 minutes Place value rounding number lines estimating reasoning

Student Task

Draw a number line from 30 to 40 on the board and ask where 37 goes and which ten it is closer to.
Teach the rule for 5, then do the first questions of activity 1 together.
Children complete activities 2 to 5; answers are in the answer key.

Classroom Use

Human number line: ten children stand holding 40 to 50; a child with a mystery number walks to the closer ten.
Rounding hill: draw a hill with 0 to 4 going up and 5 to 9 rolling down to the next ten.
Shop estimate: round the prices of two toys and add to estimate the total.

Differentiation

Support: give a number line for every question and start with numbers that are clearly close to one ten. Challenge: round three-digit numbers to the nearest ten and explain why 45 rounds to 50.

Answer Key & Assessment

Activity 1 checks rounding; activities 2 to 5 check understanding and reasoning (answer key included).

Learning Objectives

Find the two tens that a two-digit number sits between.
Round a two-digit number to the nearest ten using a number line.
Know that a number ending in 5 rounds up to the next ten.

Teacher Tips

Always ask "Which two tens is it between?" before rounding. Children who name both tens first make far fewer mistakes.

What's Included

6-page printable PDF lesson pack: teacher lesson plan with timings, materials and differentiation
Key vocabulary list (4 words with meanings and examples)
Student worksheet (5 activities)
Editable Word version of the worksheet
Complete answer key (also as a separate PDF)