9. LAND OR SQUARE MEASURE. acres. roods. rods. acres, roods. rods. sq.ft. sq. in. 478 3 31 856 2 18 5 136 816 2 17 19 3 00 6 129 49 1 27 9 1 39 8 134 63 3 34 1 3 0 143 9 3 37 o 2 27 4 34 00, 12. CIRCULAR MOTION. S. S. 3 29 17 14 11 29 59 59 1 6 10 17 0 00 40 10 4 18 17 11 9 4 10 49 6 14 18 10 4 11 6 10 COMPOUND SUBTRACTION, TEACHES to find the difference, incquality or excess between any two sums of diverse denominations. RULE. Place those numbers under each other, which are of the same denomination, the less being below the greater , begin with the least denomination, and if it exceed the figure over it, borrow as many units as make one of the next greater ; subtract it therefrom ; and to the difference add the upper figure, remembering always to add one to the next superior denomination for thni which you borrowed, Note. The method of proof is the same as in simple subtraction. EXAMPLES. (3) £. S. d. From 346 16 5 3 14 14 6 2 94 11 6 Take 128 17 4 2 10 19 6 3 36 14 8 (1) ś. d. qr. 12. Borrowed 271. 11s. and paid 191. 17s. 64. how much remains due ? Ans. £7 13s. 6d. 13. How much does 3171. 6s. exceed 1781. 185. 54d.? Ans. $138 75. 62 d. 14. From eleven pounds take eleven pence. Ans. £10 19s. id. 15. From seven thousand two hundred pounds, take 182 17s. 6 d. An£7181 28. 5 d. | 16. How much does seven hundred and eight pounds, exceed thirty-nine pounds, fifteen shillings and ten peyce halfpenny? Ans. £668 4s. 1 d. 17. From one hundred pounds, take four pence halfpenny. Ans. £99 198. 7 d. 18. Received of four men the following sums of money, viz. The first paid me 371. 118. 4d. the second 251. 16s. 7d. the third 191. 14s. 6d. and the fourth as much as all the other three, lacking 198. 6d. I demand the whole sum received ? Ans. £165 58. 4d. tb 19 9 4. APOTHECARIES' WEIGHT. tb 3 3 3 gr. 4 1 17 35 7 3 1 14 1 2 15 17 10 6 1 18 8 11 |