## A Key to The National Arithmetic: Exhibiting the Operation of the More Difficult Questions in that Work : for the Use of Teachers Only |

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15 days 5cwt A's gain A's product acres Amount brought forward Amount carried forward amount of $1 ANALYSIS B's share Balance due bearing interest Benjamin Greenleaf C's stock carats cent circle CIRCULATING DECIMALS Compound interest contents cost cube cubic feet cubic inches diameter multiplied dominical letter florins fºr FORM OF STATEMENT Fourth payment GEOMETRICAL SERIES hour-hand interest from Aug Interest from Dec interest from July Interest from March Interest from Sept July 17 June June 11 June 27 labor less than interest loss March 19 Mean rate merator miles minute-hand minutes MISCELLANEOUS QUESTIONS months National Arithmetic o'clock OPERATION pounds principal remain rix dollars rods second error Second payment Second supposition SECTION smaller cone ſº sold ſºr sphere square Subtraction subtrahend suppose Third payment tons Vulgar Fractions whole yard youngest

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Page 8 - January 31, February 28, March 31, April 30, May 31, June 30, July 31, August 31, September 30, October 31, November 30, December 31.

Page 109 - DA, we have the semi-diameter of the larger circle, 5.7735027 -(- 5 = 10.7735027. By multiplying this last number by 2, we have the diameter of the larger circle, 10.7735027 X 2 = 21.5470054. As the area of a circle may be found by multiplying the square of the diameter by .785398, therefore, by dividing the area by .785398, the quotient will be the square of the diameter. The area of the lady's field is 500 acres = 80000 square rods ; 80000 -=-.785398 = 101859.28 square of the diameter ; V 101859.28...