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Published in last 50 years
In order to perform compound sub-traction, pupils are generally taught to use one of three methods, the decomposition, the equal-addition, or the additive.
One of the important concepts in arithmetic is place value in our number system. Many students reach high school without a complete understanding of this basic characteristic of our system of numeration. That their understanding of place value is incomplete is shown when pupils have unusual difficulty with digit problems in algebra. To understand digit problems and their solution, the student must have a clear understanding of place value.
Many teachers find that place value is one of the more difficult number concepts to explain to small children. The following game was devised to help reinforce the understanding of place value after it has been introduced by the use of the Hundreds, Tens and Ones Chart. This chart is familiar to primary teachers. The game uses the same pocket device used in the chart. Thus children can reinforce their initial learning by practice under conditions similar to those in which the learning took place.