Public learning track
Place Value and Flexible Grouping to 120
1st Grade · Math · Open Global Math
9 lessons
Goal
Understand tens and ones as place value units and compose and decompose two-digit and three-digit numbers up to 120 in standard and flexible ways.
Featured Diagrams
Bundling Ten Ones into One Ten
9 lessons
0 of 9 done
- 1Bundling Ten Ones into One TenUp nextStart
- 2Understanding Decade Numbers as Groups of TenPremiumNot started yet
- 3Building Two-Digit Numbers With Base-Ten BlocksNot started yet
- 4Breaking Two-Digit Numbers into Tens and OnesNot started yet
- 5Writing Two-Digit Numbers in Expanded FormNot started yet
- 6Building Numbers in Different Ways with Tens and OnesNot started yet
- 7Flexible Partitioning of Two-Digit NumbersNot started yet
- 8Understanding Numbers from 100 to 120 with Tens and OnesNot started yet
- 9Breaking Numbers Up to 120 in Different WaysNot started yet
Curriculum Framework
1st Grade · Math · Open Global Math
1
9 lessons
Place Value and Flexible Grouping to 120
Understand tens and ones as place value units and compose and decompose two-digit and three-digit numbers up to 120 in standard and flexible ways.
2
7 lessons
Comparing and Ordering Numbers Up to 120
Compare and order two-digit and three-digit numbers up to 120 using place-value reasoning, comparative terms, and comparison symbols (>, <, =).
3
6 lessons
Mental Patterns: 1 More, 1 Less, 10 More, 10 Less
Mentally find 1 more, 1 less, 10 more, and 10 less than any two-digit number and explain digit patterns without counting.
4
9 lessons
Adding Two-Digit Numbers Within 100
Add within 100 using concrete models, number lines, place-value strategies, and expanded column methods, composing a ten when needed.
5
7 lessons
Subtracting Multiples of Ten and Subtracting from Decade Numbers
Subtract multiples of 10 from multiples of 10 and subtract single digits from decade numbers using concrete models, number lines, and inverse addition relationships.