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ten little fingers - arvind gupta (4 mb pdf)

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Slipper AbacusPLACE VALUE / DECIMAL POINT1. Take an old rubber slipper.Make three 7-8 mm diameterholes on its midline using ashoemaker’s punch.Rubber Abacus2. Insert / press fit a pencil/ reed in these holes. Theheight of the pencil shouldbe only 9 beads high.3. This simple abacus can be usedto show place value. The nu<strong>mb</strong>er293 is denoted on it.1. Cut a 5 cm x 10 cm piecefrom an old hawai chappal.2. Mark out 3 columns and9 rows of dots on it. Punchholes on the dots using a2mm shoemaker’s punch.3. Using matchsticks youcan depict any score from0 to 999 on this counter.The score right now is 159.Place Value Snake This splendid teaching aid is made from a strip of paper. Whenyou open up the snake then you see the actual place values of allthe numerals.DECIMAL ABACUS1. Cut a 6 cm x 3cm piecefrom an old rubber slipper.2. Stick 4 needles in therubber so that they are 4.5cm above.3. Cut a 6 cm x 6 cm piece ofold postcard Make 3 holes and2 slits on it. Mark a black spoton another postcard strip.4. Attach the postcard pieceto the rubber with pins.Weave the strip through theslits.5. Cut 5 mm long beads froman old refill.6. The abacus indicates520.9. It has got a slidingdecimal point

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