Subtraction Chart A

Age
3-6

Materials

 * 1) Subtraction Chart A, a chart giving positive results only for numbers 1 to 18, taking away numbers 1 to 9.
 * 2) Slips on which are written all the subtraction combinations of 1 to 18.

Presentation

 * 1) Directress shows the child how to use the Chart A.
 * 2) She takes out a slip, e.g. 9-3. First, find 9 on the top of the chart, and then find -3 on the right hand side.
 * 3) Place two fingers on the two numbers and move the fingers, sliding down and along until they meet 6.
 * 4) Record the answer.
 * 5) The child continues in this manner for all the slips.

Control Of Error
The structure of the chart provides the child with the correct answer.

Purpose

 * To help the child learn and remember the subtraction tables up to 18.