Counting Backwards from 20

Counting backwards builds the foundation for subtraction and helps children understand that numbers decrease as well as increase.

• Framework: Montessori
• Unit: Mathematics
• Learning area: Linear Counting
• Level: Ages 4-5

Objectives

• Count backward from 20
• Build subtraction readiness
• Develop reverse sequence fluency

Materials

• Number line 0-20
• Small figure for 'walking'
• Numeral cards 0-20

Instructions

1. Arrange numeral cards 0-20 in line. 2. 'Let's count backwards from 20.' Walk figure back. 3. '20, 19, 18, 17...' touching each card. 4. 'Where do we end? Zero!' 5. Practice starting from different numbers. 6. 'Count back from 15.'

Educator tip

Rocket launch countdown is a fun context: '10, 9, 8... blast off!' Extend to 20 for challenge.

Assessment

Child counts backwards from 20 fluently and from any starting point.

More from Mathematics

• The Bank Game
• Numeral Card Composition
• The Change Game
• Golden Bead Number Dictation
• Static Addition (No Exchanging)
• Multiplication with Golden Beads
• Division with Golden Beads
• Stamp Game Addition