Public learning track
Mental Patterns: 1 More, 1 Less, 10 More, 10 Less
1st Grade · Math · Open Global Math
6 lessons
Goal
Mentally find 1 more, 1 less, 10 more, and 10 less than any two-digit number and explain digit patterns without counting.
Featured Diagrams
Finding 1 More and 1 Less on the Hundred Chart
6 lessons
0 of 6 done
- 1Finding 1 More and 1 Less on the Hundred ChartUp nextStart
- 2Finding 10 More and 10 Less on the Hundred ChartPremiumNot started yet
- 3Crossing Decade Numbers with 1 More and 1 LessNot started yet
- 4Mentally Finding 10 More and 10 Less Than Any Two-Digit NumberNot started yet
- 5Explaining Digit Patterns in Mental Place Value ChangesNot started yet
- 6Solving Missing-Number Grid Puzzles with More and LessNot 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.