Subtraction Tables - Subtraction With Short Bead Stair

Age
3-6

Materials

 * 1) One set of Short Bead Stair.
 * 2) Work cards for the child to complete with Subtraction Tables up to 9.
 * 3) Subtraction Summary Tables.

Presentation

 * 1) Directress invites the child to build a triangle with the Short Bead Stair.
 * 2) Directress reads the first example on the work card, e.g. 9-3.
 * 3) Directress selects the 9 Bead Bar and then counts 3 beads from the right end.
 * 4) Cover the 3 beads and count the remainder left uncovered.
 * 5) Explain that 9-3=6.
 * 6) Directress then shows the child how to record the answer on the answer square.

Control Of Error

 * 1) The Short Bead Stair acts as a control of error because the quantities are fixed.
 * 2) The Summary of Subtraction tables makes it possible for the child to correct his own work.

Purpose

 * To give the child further experience in handling numbers up to 9 with concrete materials and practice in recording subtraction tables.