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1st Grade Math
9. 1.NBT.A.1
9.1 Converting dot grids to numbers up to 100
Converting Dot Grids to Numbers up to 100
Turn dot grids and ten frames into numbers up to 100 by spotting full rows of ten and counting the leftover dots as ones.
What You'll Learn
Identify each complete row of ten dots in a grid as one group of ten
Count the leftover dots in the last, unfinished row as the ones digit
Apply the idea \( n = 10t + o \), where \(t\) is the number of full ten-rows and \(o\) is the leftover dots
Skip count by tens across the full rows, then count on by ones for the remainder
Recognize that a completely filled ten by ten grid always represents 100
Check your answer by comparing the dot grid to a number grid up to 100
What You'll Practice
1
Counting dots arranged in grid patterns
2
Determining total quantities from visual dot arrays
3
Working with grids containing up to 100 dots
Why This Matters
Converting dot grids to numbers builds your foundational counting and number sense skills. This visual approach to understanding quantities strengthens your ability to work with arrays, multiplication concepts, and organized dataskills you'll use throughout elementary math.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Counting
Number Sense
Arrays
Skip Counting
Visual Math
OH Curriculum Aligned