Grade 1 - Lesson 15 - Understanding Tens and Ones

Grade 1 Math Worksheets – Lesson 15: Understanding Tens and Ones

Help your first grader build an important foundation in place value with Lesson 15: Understanding Tens and Ones from the Grade 1 Math Worksheets workbook. This lesson teaches children how two-digit numbers are made from groups of tens and extra ones.

Designed for children ages 6–7, this lesson helps students understand that a number like 34 means 3 tens and 4 ones. Children practice using visual models, counting groups, identifying tens and ones, writing two-digit numbers, and connecting numbers to place value concepts in a simple and clear way.

With 23 pages of focused practice, Lesson 15 prepares students for comparing numbers to 100, adding and subtracting two-digit numbers, counting by tens, and solving more advanced number problems. The activities are visual, structured, and easy to follow, making this lesson helpful for classroom learning, homeschooling, tutoring, and extra practice at home.

Perfect for:

Parents, teachers, homeschoolers, tutors, and first-grade students who are beginning to learn place value.