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2
🔢Sentido NuméricoTerm 1

Week 2: Addition & Subtraction

Cycle 1
Years 1 & 2 · Ages 6–8
A.2.1
Core Standard

Add and subtract within 100 using mental and written strategies

A.2.1 — Adición y sustracción de números naturales
Core Activities
  • 1Number bond games to 20
  • 2Column addition with no regrouping
  • 3Subtraction stories with objects
LOMLOE Competencies
CE1Reason mathematically
CE2Represent and connect mathematical ideas
Cycle 2
Years 3 & 4 · Ages 8–10
A.2.1
Core Standard

Add and subtract 4-digit numbers using formal written methods with regrouping

A.2.1 — Operaciones con números hasta 10.000
Core Activities
  • 1Column addition/subtraction with regrouping
  • 2Estimate before calculating
  • 3Check answers using inverse operations
LOMLOE Competencies
CE1Reason mathematically
CE2Represent and connect mathematical ideas
CE3Communicate mathematical thinking
Cycle 3
Years 5 & 6 · Ages 10–12
A.2.1
Core Standard

Add and subtract integers and decimals; apply to real-world financial contexts

A.2.1 — Operaciones con enteros y decimales
Core Activities
  • 1Calculate with decimals in context (shopping, distances)
  • 2Add and subtract negative numbers
  • 3Use mental strategies for large numbers
LOMLOE Competencies
CE1Reason mathematically
CE2Represent and connect mathematical ideas
CE3Communicate mathematical thinking
CE6Apply mathematics to real life