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8
🔢Sentido NuméricoTerm 1

Week 8: Mental Maths & Estimation

Cycle 1
Years 1 & 2 · Ages 6–8
A.2.4
Core Standard

Use mental strategies for addition and subtraction; round to nearest 10

A.2.4 — Cálculo mental y estimación
Core Activities
  • 1Number bond speed games
  • 2Rounding on a number line
  • 3Estimate quantities in jars
LOMLOE Competencies
CE1Reason mathematically
CE2Represent and connect mathematical ideas
CE7Manage emotions and develop resilience
Cycle 2
Years 3 & 4 · Ages 8–10
A.2.4
Core Standard

Use efficient mental strategies; estimate and check calculations

A.2.4 — Estrategias de cálculo mental
Core Activities
  • 1Mental multiplication tricks (×9, ×11)
  • 2Estimate and check with inverse
  • 3Approximation in real contexts
LOMLOE Competencies
CE1Reason mathematically
CE2Represent and connect mathematical ideas
CE3Communicate mathematical thinking
CE7Manage emotions and develop resilience
Cycle 3
Years 5 & 6 · Ages 10–12
A.2.4
Core Standard

Apply estimation and approximation to complex calculations; use significant figures

A.2.4 — Estimación y cifras significativas
Core Activities
  • 1Fermi estimation problems
  • 2Significant figures in science
  • 3Order of magnitude reasoning
LOMLOE Competencies
CE1Reason mathematically
CE2Represent and connect mathematical ideas
CE3Communicate mathematical thinking
CE5Model real-world situations
CE7Manage emotions and develop resilience