ADDITION 



ADDITION 



BEAN BAG GAME 



sides; then the child having the greater num- 

 ber of cards wins. 



4. To keep the see-saw balanced what 

 must n be? The teacher draws the sea-saw 

 18 9+N 



***$>-. 



row" columns, "short, wide" columns, "long, 

 wide" columns. Let him use tests suggested 

 further on in this article. He may time him- 

 self, seeing how many problems he can do in 

 a minute, in three minutes, five minutes. If 

 there are two or more persons working to- 

 gether, zest is added as to accuracy and time. 



SEE-SAW 



on the board; changes one or both numbers 

 when child has substituted correct digit for rc. 

 Sources of problems in addition found in 

 current literature, connecting arithmetic with 

 geography, history, study of social conditions, 

 civics and "current events": 



1. Products of the country given in quantity 

 and value ; wheat, corn, oats, potatoes, hay, meat, 

 butter, eggs, flour, cotton, coal, lumber, iron, 

 steel, and so on. These appear in various ways ; 

 for example, they may be given yearly over a 

 period of twenty years. Child adds to find for a 

 period of 5 years or 10 years, or 15 years, and 

 so on. 



2. Exports are given in same way. 



3. Acreage devoted to various products in 

 different states. From this the child finds area 

 in certain sections or in the whole country, given 

 over to wheat, cotton, etc. 



4. Areas of states given. Child finds area of 

 a given section ; for example, the Middle West. 



5. Population may be added in the same way. 



6. The same material is given concerning for- 

 eign countries. 



7. Imports to the country. 



8. Immigration covering a period of years. 



9. Health statistics. 

 10. Tax statistics. 



Suggestions jor self help. The child may 

 set down problems for himself, and he may 

 vary his columns. Let him write, "long, nar- 



SAND TABLE 



Processes of Addition. The above are sug- 

 gestions as to conditions that give rise to 

 problems in addition, and develop keen interest 

 for mathematical values. What immediately 

 follows will deal with the process of addition. 

 In the early days of the work, the numbers 



