NOTE.-We think that, as a general thing, the first solution will be found the most convenient. The teacher alone can judge of the expediency of having the class attempt to master both.

* In adding yards, the reductions can generally best be made by regarding every 11 yards as 2 rods. It should be also borne in mind that } yard equals 1 ft. 6 in., and that if, in any case, there are 5 yd. and 1 ft. 6 in. besides, the value can best be expressed as 1 rod.

(a.) SUBTRACTION is a process by which we find how many units there are in the difference of two numbers, or in the excess of one number over another.

(b.) The larger given number, or the one from which we sub. tract, is called the MINUEND; the smaller number, or the number subtracted, is called the SUBTRAHEND; and the result is called the DIFFERENCE or REMAINDER.

ILLUSTRATIONS. - In “3 from 7 leaves 4,” or “7 — 3 = 4," 7 is the minuend, 3 is the subtrahend, and 4 is the difference or remainder.