Everyday Use of Addition and Subtraction Read each of the following problems carefully before you work it. Ask yourself, "Should the answer be more or less than the larger number in the problem?" If it is more, add; if less, subtract. 1. Sam has 28 cents. Robert has 14 cents less than Sam. How much has Robert? 2. Peggy has 37 cents. Nora has 7 cents more than Peggy. How much has Nora? 3. There are 19 boys and 9 girls in our schoolroom. How many children are there in our room? 4. David played store. sold 7 pies. Then he had He had 14 mud pies and pies. 5. Jack is 8 years old. His brother is 2 years older than Jack. How old is Jack's brother? 6. If Sam beat rugs for 23 minutes, and carried in wood for 7 minutes, how many minutes did he work? 7. Mary spent 15 cents for stamps and 5 cents for post cards. How many cents did she spend in all? 8. Robert had 10 cents and spent 8 cents for a top. How many cents did he have then? 9. Sarah had 10 roses. She gave away all but How many roses did she give away? 4 roses. 10. Ann had a string of 44 beads. and she lost 2 beads. She then had The string broke -beads. 11. Herbert has read 5 pages. James has read 4 more pages than this. James has read pages. 12. Sarah has read 68 pages. Ann has read 34 pages less than Sarah. How many pages has Ann read? Review of Addition, Subtraction, and Multiplication Read and fill in the blanks: 1. The sum of 10 and 6 is 2. The difference between 14 and 7 is 8. 17 is -less than 19. 9. The product of 5 and 10 is 10. The difference between 10 and 5 is 11. 9 minus 2 equals 12. 8 plus 2 equals 13. 8 times 2 equals 14. 9 cents and 9 cents are 15. 8 is 4 greater than 16. How much less than 10 is 7? 17. The product of 7 and 4 is 18. 4 times 9 is 19. 6 cents and 4 cents are 20. The difference between 19 and 6 is Problems in Addition, Subtraction, and Multiplication Each of these problems may be worked by one of the following ways: addition, subtraction, or multiplication. As an oral exercise, tell what you would do to solve each problem. In the first problem say, "I should multiply 21 by 4." Then work each problem. 1. Four boys are saving money to buy a ball. If each boy has saved 21 cents, how many cents have all 4 boys saved? 2. There were 25 girls and 24 boys at a school party. How many children were at the party? 3. Helen put 4 cents in her bank each day for 24 days. How many cents did she put in her bank? 4. John has 91 United States stamps, and 89 foreign stamps. How many stamps has he in all? 5. James has 132 stamps in his album. Mary has 2 times as many. How many stamps has Mary? 6. Jane found 18 eggs one day and 8 eggs the next day. How many eggs did she find in all? 7. Robert earned 69 cents and spent 34 cents. How many cents did he have left to put in his bank? 8. Luke has 67 cents, and he wants to buy a bat costing 99 cents. How much more money must he get before he can buy the bat? 9. Ruth can string beads 4 times as fast as her little sister can. While Sarah is stringing 23 beads, how many beads can Ruth string? 10. Henry saved 51 cents last month and 48 cents this month. How much did he save in both months? 11. Together Ann and Lucy earned 69 cents. Ann earned 32 cents of this. How much did Lucy earn? 12. If you know how many cents Mary has, and that Ann has 8 cents more than Mary, would you add or subtract to find out how many cents Ann has? 13. If you know how many cents Arthur has, and know that Will has 6 cents less than Arthur, how would you find out how many cents Will has? |