TOPIC
MY PROGRESS
Pug Score
0%
Best Streak
0 in a row
Study Points
+0
Overview
Practice
Watch
Read
Next Steps
Get Started
Get unlimited access to all videos, practice problems, and study tools.
Unlimited practice
Full videos
Back to Menu
Topic Progress
Pug Score
0%
Videos Watched
0/0
Best Practice
No score
Read
Not viewed
Best Streak
0 in a row
Study Points
+0
Overview
Practice
Watch
Read
Next Steps
Overview
1st Grade Math
12. 1.NBT.C.4
12.4 Using counting to add digits up to 100
Using Counting to Add Digits up to 100
Master the counting on strategy for addition: start at the bigger number and count on by ones or tens to add any two digits up to 100.
What You'll Learn
Identify the larger number in an addition problem and start counting from there instead of from zero
Count on by ones to add a small number, such as \( 34 + 4 \), by saying 35, 36, 37, 38
Count on by tens first and then by ones for bigger jumps, such as \( 47 + 32 \)
Use a mental or physical hop for each number counted so no step gets skipped or repeated
Recognize when counting on is faster than counting all, especially when one addend is very small
Check a counting on answer by comparing it to related strategies like doubles or number lines
What You'll Practice
1
Adding by counting on using a number track up to 100
2
Starting from the first number and counting forward to find totals
3
Using visual number sequences to solve addition problems
Why This Matters
Counting on is a fundamental strategy that builds your number sense and mental math abilities. Mastering this skill helps you add quickly without relying on fingers or objects, preparing you for more complex arithmetic and problem-solving in everyday situations.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Addition
Counting On
Number Sense
Number Line
Mental Math
OH Curriculum Aligned