Grubes Method of Teaching Arithmetic Explained And Illustrated Also the Impr
Grubes Method of Teaching Arithmetic Explained And Illustrated Also the Impr
Seeley Levi
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etc. d. 40 = 10 + 30 40 == 60 20 40 = 20 + 20 40 = 50 10 50 = 10 + 40 50 = 80 30 50 = 20 + 30 50 = 90 40 60 = 10 + 50 30 = 70 40 60 = 20 + 40 30 = 90 60 60 = 30 + 30 60 = loo 40 etc. 94 THE SECOND YEAR: 10-100. 60 = 20 -f 20 + ? . 70 = 10 + 30 + ? 50 = 30 -f 10 + ? 80 = 40 + 10 + ? 90 = 70 -I- 30 ? 60 = 80 + 10 ? 40 = 50 + 20 ? Each group to be written from dictation. /. Concrete examples : If a man travels 20 and 30 and 40 miles, how far has he gone ? From A to B is 30 miles, from B to C is 50... miles, from C to D is 20 miles. How far is A from D ? If I had 90 miles to travel, and have already gone 30 miles, how many miles remain to travel? (Make more examples of this kind. ) SECOND UNITY. (Multiplication and Division. ) First Step. Review first a few numbers : 1x1 = 1 i in 1 = 1 2x1 = 2 i in 2 = 2 3x1=3 i in 3 = 3 4x1=4 I in 4 = 4 till till 10 x i = 10 i in 10 = 10 Second Step. a. Count off the first 10 miles on the numeral frame, also the 2d, 3d, etc. , till the loth. b. Name the ordinals forwards and backwards from the frame as follows : That is the first 10 miles ; " second 10 " till That is the tenth 10 miles.
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