Subtraction Tables
The equations for the Subtraction Strip Board, printed as tables: 18 sheets to a set, ten complete sets in the box. Ten sets is the specification that matters, because it means a class works at the same time instead of queueing for one copy, and a sheet that gets written on or lost is replaced from the same box. The strip board itself is a separate item. The sheets are what turn the board from a demonstration into daily work with a beginning and an end.
“The hands are the instruments of man's intelligence.”
The Subtraction Tables exist in the Montessori mathematics sequence as a bridge between concrete manipulation and abstract thinking.
- Memorization of subtraction facts from 1-18
- Recognition of inverse relationships between addition and subtraction
- Development of mental calculation strategies
- Pattern recognition in number sequences
Read More
These cardstock equation cards address the child's need to internalize subtraction facts through systematic, repeated practice after extensive work with golden beads and other manipulatives. The separate answer cards enable independent verification, allowing children to discover patterns in subtraction relationships without adult intervention. By presenting equations from 1-18 in organized format, the tables respond to the mathematical mind's desire for order and completeness. The durable cardstock construction withstands repeated handling as children progress from matching known facts to calculating new ones. This systematic approach to subtraction memorization follows the child's natural progression from counting backwards with objects to instant recall of number relationships.
How to present it
Follow the Montessori method of presentation for optimal child development.
Organize equation cards by minuend (1-18) in separate columns on a mat. Place answer cards in a basket nearby.
- 1
Select one column of equations (e.g., all subtractions from 9)
Start with smaller numbers until the process is familiar - 2
Read each equation aloud and calculate the answer
Allow use of bead bars or fingers initially if needed - 3
Find the corresponding answer card and place it beside the equation
Encourage systematic searching through answer cards - 4
After completing the column, turn over answer cards to verify
Mark any errors for additional practice - 5
Record completed equations in mathematics notebook
Drawing can help visualize the subtraction process
Every Child Is a Little Creator
Heritage
Since 1929
Brands used by
schools worldwide
European brands
AMI
Endorsed
Related Materials
