135. Study Exercises.

Study as indicated in Steps A and B, pp. 48, 49.

TO THE TEACHER. Dictate the combinations involved in the above study. See p. 49.

137. Drill columns. A drill column is one in which a combination occurs several times. To make a drill column for 8 and 7: Write the combination at the foot of the column. The sum is 15. Place in the column a number that will increase the sum to either 18 or 17. This number is either 3 or 2. Either can be used. If 2 is taken, the sum is increased to 17. Then place 8 in the column. The sum is 25. Again add either 3 or 2, and continue as above.

Write a drill column for 6 and 7; for 9 and 6; for 8 and 5; for 9 and 7.

2. Give a number story suggested by each.

3. A board 11 ft. long will make two shelves, one 4 ft. long and the other ft. long.

4. How many days are there from April 3 to April 11 ?

5. There were 11 marbles in a ring. 3 of them out of the ring. There were left in the ring.

6. A farmer sold 14 sacks of grain. wheat, and the rest were oats. He sold

oats.

Frank shot marbles

Five were sacks of

Draw a diagram to show the places mentioned in each of the following problems:

7. Harry's home is 1 mile north of the schoolhouse, and Willie's home is 2 miles south of the schoolhouse. How far apart do they live?

8. Mary's home is 4 blocks east of the schoolhouse, and Edna's home is 7 blocks west of the schoolhouse. How far apart do they live?

9. Fred lives 9 miles west of the city, and James lives 14 miles west of the city. How far apart do they live?

Study the above until you can give the results without hesitation.

Add each column as indicated in Step C, p. 49.

3. A quarter-dollar is cents; dimes and

cents.

nickels; 2

4. If Edna buys a box of berries for 15 cents and gives the clerk a 25-cent piece, how much change will she receive?

5. Mabel buys 35 cents' worth of sugar and gives the clerk a half-dollar. The clerk counts the change as he gives it to Mabel. He begins with the cost of the sugar and says, 35 and 5 are 40, and 10 are 50, as he gives her a nickel and a dime.

6. Ethel bought 30 cents' worth of ribbon and handed the dealer a half-dollar. Count the change.

143. Have the pupils take turns at "keeping store." Supply them with paper coins (or better, with real coins), and have them make purchases and count the change.

144. Oral Problems.

1. A boy paid 50 for a baseball and 30 for a glove. How much did he pay for both?

2. Harry and James picked two boxes of apples and sold them at 60 a box. How much did they get for both boxes?

3. If there are 24 boys and 32 girls in the school, how many children are there in the school?

4. Six boys bought a dozen bananas and shared them equally. How many bananas did each boy get?

5. A farmer had 60 sheep. How many did he have after selling 20 sheep?

6. It is 2 miles from Arthur's home to his aunt's. On Saturday Arthur made two trips on his bicycle to his aunt's and return. How many miles did he ride?

7. If it takes 3 yards of cloth to make one apron, how many aprons can be made from 12 yards?

8. If oranges sell at 20 a dozen, how many dozen can be bought for 60?

9. What is the cost of 3 pounds of coffee at 30 a pound?

10. What is the cost of five 2-cent stamps?

11. At 60 cents a yard, how much will yd. of cloth cost?

12. How many gallons are there in 12 quarts?