(b) You should be able to give all the differences in the following examples in 1 minute. Practice till you can do this. Read the remainder; the subtrahend; the minuend. 24. 120 73 26. 1302 982 28. 12,032 - 4848 27. 1274 - 369 29. 17,245 986 THROWING THE BASKET BALL The following table shows how far boys and girls of different ages should be able to throw a basket ball. The distances are given in feet. Age (in years) 8 9 10 11 12 13 14 15 Boys (feet in throw) 14 16 18 20 23 24 How far should a boy 10 years old be able to throw a basket ball? A girl 10 years old? A girl 10 years old? A boy 12 years old? 1. How much farther should a 10-year-old boy be able to throw a ball than a 10-year-old girl? 2. Should a 12-year-old girl be able to throw the ball farther than a 10-year-old boy? 3. How much farther should a 13-year-old girl throw the ball than a 9-year-old boy? 4. A 13-year-old boy than a 9-year-old girl? 5. A 15-year-old girl than an 8-year-old boy? 6. A 15-year-old boy than an 8-year-old girl? 7. Sam, who is 10 years old, can throw the ball 22 ft. Is he able to throw the ball as far as he should? 8. Mary is 13 years old. She can throw the ball How much farther should she be able to throw 18 ft. it? Subtraction (a) Give the differences: 1 1 11 11 11 11 11 11 11 11 7 1 0 4 9 6 3 8 5 (b) To check an example in subtraction, we add the remainder to the subtrahend to get the minuend. Subtract and check: 11,021 4286. When you check, if the result is not exactly the same as the minuend, go over your work, and find your error. Everyday Use of Subtraction 1. Charles had 401 stamps and sold 65 of them. How many stamps did he have left? 2. Father weighs 171 pounds, and Peggy weighs 73 pounds. Father weighs pounds more than Peggy. 3. There are 211 pupils in a certain school. Of these, 98 are boys. How many are girls? 4. Robert is 11 years old. In how many years will he be 30 years old? 5. We bought a box of 150 pieces of loaf sugar. At the end of the week there were 13 pieces left. How many pieces did we use? 6. Sarah had 4 dimes and 4 cents. She bought 25 cents' worth of Christmas cards. How much money did she have left? 7. Lucy bought some beads for 50¢, and after stringing them sold them for 75¢. How much did she make? 8. Dick paid 38¢ for feed for his chickens one week and sold his eggs for 65¢. How much did he make? 9. Mary bought some sugar for 28¢, and gave the storekeeper a half-dollar. She would get change. 10. Mother sent Dorothy to the store with 75 cents. She told her that after she bought 68 cents' worth of flour she could spend the rest of the money for candy. How much could Dorothy spend for candy? |