31. A man travelled 21 miles on Monday and 16 on

Tuesday: how far did he travel in both days?

32. There are 33 boys and 25 girls in school: how many pupils are there in the school?

33. A horse cost 105 dollars, a cow 43 dollars and a sheep 10 dollars: how much did they all cost?

34. A boy bought two hens for 50 cents, a duck for 25 cents and some feed for 12 cents: how much did he pay for all?

35. If I pay 122 dollars for a buggy, 45 dollars for harness and 200 dollars for a horse, how much do I pay for all?

To Add when the Sum of a Column exceeds Nine Units of

that place.

ORAL EXERCISE.

1. How many are 5 apples and 5 apples? 3 pens and 8 pens?

2. How many are 4 dollars and 6 dollars?

3. A boy has 5 fingers on each hand: how many has he on both?

4. How many are 5 cents, 6 cents and 7 cents?

5. A hog cost 10 dollars, a sheep 5 dollars and some hens 7 dollars: how much did they all cost?

6. A pair of boots cost 12 dollars, a hat 7 dollars and some socks 2 dollars: how much did they all cost?

7. How many are 7 books, 9 books and 22 books?

8. Mary has 10 cents, John has 12 cents and James has 15 cents: how many cents have they together?

9. A boy has 12 hens, 6 turkeys and 15 ducks: how many fowls has he?

10. A boy learns 6 letters one day, 5 letters the next, 4 letters the next, and 2 letters the next: how many does he learn in the four days?

WRITTEN EXERCISE.

Ex. How many are 6 horses, 8 horses, 4 horses and 5 horses?

Explanation.-We write the numbers under one another, and add, beginning at the bottom: 5 and 4 are 9, and 8 are 17, and 6 are 23, which is 2 tens and 3 ones. We write the 3 in the units' place, and the 2 in the tens' place.

(2.)
8 sheep.

5 cows.

6431

66

39

6

9

ADD. 423

347 849 1619

5

Explanation.—We write the numbers so that units are under units, tens under tens, and hundreds under hundreds, and begin to add at the right: 9 and 7 are 16, and 3 are 19 ones, or 1 ten and 9 ones. We write the 9 in the units' place, and add the 1 ten to the tens: 1 and 4 are 5, and 4 are 9, and 2 are 11 tens, or 1 hundred and 1 ten. We write the 1 ten in the tens' place, and add the 1 hundred to the hundreds : 1 and 8 are 9, and 3 are 12, and 4 are 16 hundreds, or 1 thousand and 6 hundreds. We write the 6 hundreds in the hundreds' place and the 1 thousand in the thousands' place. The result is, therefore, 1619.

41. Of 6472+8733+4633+4854.
42. Of 2762+8756+9783+4578.
43. Of 1617+8743+7284+9621.
44. Of 2650+4062+8705+ 9030.
45. Of 5005+6007 +7583+4783.
46. Of 27845+67832+74281+68432.
47. Of 47823+ 68421 +70070+60504.
48. Of 127+6434+7805+60007.
49. Of 10+8756+405+66782.

50. Of 7560+804+7854+87400.

51. Of 1525 +960 +820 +16+37800.

PROBLEMS.

1. A merchant sells 44 yd. of cloth on Monday, 62 yd. on Tuesday and 30 yd. on Wednesday: how much does he sell in the three days? - Ans. 136 yd.

2. A farmer raises 650 bu. of wheat in one field, 420 bu in another and 725 bu. in another: how many bushels does he raise in the three fields? Ans. 1795 bu.

3. A grocer sold 850 lb. of sugar in March, 927 lb. in April and 1640 lb. in May: how many pounds did he sell in the three months? Ans. 3417 lb.

4. A knife cost 62 cts., a slate 44 cts., a reader 95 cts. and a grammar 65 cts.: how much did they all cost? Ans. 266 cts.