Chapter 7 The Study Of Numbers Up To 20

twelve different writings, all of which the children should be encouraged to find; for instance: 5 + 7 = 12 7 + 5 = 12 12 = 5 + 7 12 = 7 + 5

12 – 5 = 7 12 – 7 = 5 7 = 12 – 5 5 = 12 – 7

12 – 7 – 5 = 0 12 – 5 – 7 = 0 12 – (5 + 7) = 0 12 – (7 + 5) = 0

Each particular combination of 12 could be studied in this way. Addition with a gap Both additions and subtractions can be read or written by just looking at a pattern. This could be presented as follows: Form the length which represents 12 with your rods and put the black rod alongside. What must be added to 7 to make 12? or which rod makes up the difference between 12 and 7? Using the notation for addition, this could be written as 7 + = 12, 12 = 7+ . Translating written mathematical statements into rod patterns Practice in the reverse process of making rod patterns from written mathematical statements is an experience which should

137

The Cuisenaire Gattegno method of teaching Mathematics

The Cuisenaire Gattegno method of teaching Mathematics

The Cuisenaire Gattegno method of teaching Mathematics

The Cuisenaire Gattegno method of teaching Mathematics