Subtraction Strip Board

Age
3-6

Materials

 * 1) A number line board with numbers 1 to 18.
 * 2) One set of number strips from 1 to 9 in red.
 * 3) A Blank Strip.
 * 4) Subtraction Cards with examples of subtraction questions with minuends of up to 18.

Presentation

 * 1) Directress builds the strips on the board. from the work card, e.g. 9-5.
 * 2) Directress takes the Blank strips and covers after 9.
 * 3) She then takes a 'five' strip and places it next to the blank strip on the board.
 * 4) "How many left?"
 * 5) Then she counts the number of squares left uncovered, i.e. 1, 2, 3, 4.
 * 6) Then the Directress says "Nine minus five equals four".
 * 7) Directress also points out that the answer can be obtained by looking at the answer stated on the top row of the board.
 * 8) Encourage the child to work through the questions on the work cards and records his answer.

Control Of Error
The numbers on the board act as a Control of Error.

Purpose

 * To give the child further experience in subtraction and to extend the subtraction activity up to 18.