Articoli correlati a Grube's method of teaching arithmetic; explained...
Grube's method of teaching arithmetic; explained and illustrated, also the improvements upon the method made by the followers of Grube in Germany - Brossura
Sinossi
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 Excerpt: ...= 26--20+10 + 10 = 15 + 10--20 + 25 = FIFTH UNITY. First Step. a. Length of the schoolhouse. 30 paces (children know as far as that), and still 8 paces. Width of the schoolhouse: 16 paces. Other exercises that require counting. b. Review the numbers 1 to 30. Second Step. a. Extend the counting to 40: 30 paces + 8 paces, etc. b. Count on the numeral frame from 30 to 40, 1 to 40, forwards and backwards. c. Write the new numbers from dictation, and separate them into tens and units. Third Step. Exercises like the previous ones extended to 40. a. 10 + 1 = 11 20 + 1 = 21 30 + 1 = 31 10 + 2 = 12 20 + 2 = 22 30 + 2 = 32 etc. 10--1 = 9 20--1 = 19 30--1 = 29 40--1 = 39 10--2 = 8 20--2 = 18 30--2 = 28 40--2 = 38 etc. Fourth Step. a. Write 12, 21, 13, 31, 23, 32. Separate into tens and units. b. 24 paces +10 paces--20 paces = 20 years + 17 years + 2 years--15 years = etc. Continue until the new numbers are thoroughly mastered. SIXTH UNITY. 1 to SO. SEVENTH UNITY. I to 60. EIGHTH UNITY. 1 to 80. NINTH "UNITY. 1 to 1 OO. The method pursued in these will be the same as previously given, and therefore needs no further explanation. Dollars and cents can be taught in the last " unity." SECTION in. 'Development of the whole range from 1 to 100 by building each number from products of small numbers. This includes multiplication and division within these limits. TENTH UNITY. (Multiplying and dividing by 2.) First Step. Children should be drilled in the kinds of coins from 1 dollar down, the coins being shown them. They should be able to tell quickly how many cents each coin equals in value. Attention must be called to the differences between the coins, so that the children can readily distinguish them. Little examples should be made, the children working them ou...
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