Grade 1 - Lesson 21-24 - Review of Lessons 21-24

Grade 1 Math Worksheets – Lessons 21–24: Time-Telling and Addition/Subtraction Facts to 18

Help your first grader strengthen real-life math skills and math fact fluency with Grade 1 Lessons 21–24 from the First Grade Math Worksheets workbook. This lesson set focuses on telling time, reading clocks, and practicing addition and subtraction facts up to 18.

Designed for children ages 6–7, these lessons help students understand how to read analog clocks, identify the hour and minute hands, match clocks to written times, and connect time to daily routines. Students also practice addition and subtraction facts to 18, helping them build speed, accuracy, and confidence with basic math facts.

This set includes 4 focused lessons:

Lesson 21: How to Tell Time Part I

Students begin learning how to read clocks by identifying clock faces, hour hands, minute hands, and simple times.

Lesson 22: How to Tell Time Part II

Students continue practicing time-telling skills by matching clocks to written times and connecting time to everyday routines.

Lesson 23: Introducing Addition Facts to 18

Students practice addition facts with sums up to 18 using number sentences, visual models, and counting strategies.

Lesson 24: Introducing Subtraction Facts to 18

Students practice subtraction facts within 18 using number sentences, visual models, counting-back strategies, and repeated practice.

Together, Lessons 21–24 help students build practical time-telling skills and stronger addition and subtraction fluency. These lessons prepare children for word problems, daily schedule understanding, two-digit math, mental math, and more advanced first-grade problem solving.

Perfect for:

Parents, teachers, homeschoolers, tutors, and first-grade students who need practice with telling time and addition/subtraction facts to 18.