88 MULTIPLICATION BY TWO 1. There are 2 pints in 1 quart. How many pints are in 6 quarts? In 8 quarts? In 3 quarts? In 9 quarts? 2. I bought 10 baskets of apples at 2 dollars a basket. How much did they cost? 3. Frank walked 2 miles an hour for 4 hours. How many miles did he walk? 4. A family uses 3 quarts of milk each day. How many quarts does the family use in 2 days? 5. There are 2 horses in a team. How many horses are in 5 teams? 6. Each of 2 girls has 7 dolls. How many dolls have both the girls? 7. Each of 2 girls has 4 flags. How many flags have both? 8. Each of 2 boys catches 8 fish. How many fish do they both catch? 9. Harry sold 7 puppies at 2 dollars each. How much did he get for them? 10. Kate gave 2 pieces of candy to each of her 6 friends. How many pieces did she give to her friends? 11. John drinks 2 glasses of milk each day. How many glasses of milk does he drink in 7 days? To find the value of 4×2+1, first multiply 4 by 2, then add 1. The answer is 9. 90 DIVISION BY TWO Find 6 pieces of chalk. Arrange them in groups of 2's. How many groups have you? How many 2's are in 6? How many 2's are in 4? In 10? In 12? Find 8 blackboard erasers. Arrange them in groups of 2's. How many groups have you? How many 2's are in 8? To find how many groups of 2's there are in a number, you divide the number by 2. When you arrange 8 in groups of 2's you divide 8 by 2. 1. How many 2-cent stamps can you buy for 8 cents? 2. How many pencils at 2 cents each can you buy for 10 cents? How many can you buy for 6 cents? 3. Ten cents will buy how many 2-cent stamps? 4. Mrs. Jones told her two little daughters, Ethel and Agnes, that she would give them both 14 cents if they wiped the dishes every night for a week. At the end of the week, what was each little girl's share? 5. At two cents each, how many apples will 14 cents buy? DIVISION BY TWO 91 1. Esther's mother had 14 flower bulbs to plant. She put 2 in each flower pot. How many flower pots did she use? 2. On Easter Sunday Martha's teacher brought a bunch of 20 tulips to give to the children in her class. There were 2 tulips for each child present. How many children were present? 3. At a party, 12 children were asked to choose partners for a game. How many pairs of partners were there? 4. Some girls were making rag dolls for orphan children. At the end of the week they had made 24 dolls. How many children will be made happy if 2 dolls are sent to each child? 5. It takes 16 forks to set the table. If 2 forks are laid at each place, how many places are set? 6. Six children were riding horseback. There were 2 children on each pony. How many ponies did they have? 7. I bought 8 handkerchiefs for presents. If I put 2 handkerchiefs in each box, how many boxes must I have? 8. From a box of 24 pencils, there were just enough to give each pupil in the B class 2 pencils. How many pupils were in the B class? 9. John's father paid 18 cents for postage stamps to mail some letters. If each stamp cost 2 cents, how many letters did he mail? 10. There are not enough songbooks in Miss Brown's room for the pupils. If 2 children can use one songbook, how many songbooks will be needed for 12 children? 92 MULTIPLICATION BY FIVE Count by 5's to 60. 5 10 15 20 25 30 35 40 45 50 55 60 Read the following chart in this way: One 5 is 5, two 5's are 10, three 5's are 15, four 5's are 20, and so on. Write columns like the above containing seven 5's, eight 5's, nine 5's, ten 5's, eleven 5's, and twelve 5's. Read and learn the following table of 5's: |