## 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 A's gain A's money A's product A's stock acres Amount brought forward Amount carried forward amount of $1 ANALYSIS B's share Balance due bearing interest carats CIRCULATING DECIMALS Compound interest contents cost cube cubic feet cubic inches diameter multiplied dominical letter florins 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 11 June 27 labor less than interest loss March 19 Mean rate merator miles minute-hand minutes MISCELLANEOUS QUESTIONS months o'clock OPERATION pounds principal receive remain rix dollars rods School Committee second error Second payment Second supposition SECTION sold sphere square SUBTRACTION subtrahend suppose Third payment tons value of Iqr VULGAR FRACTIONS yard youngest

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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...