Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση
[blocks in formation]

PROBLEMS.

1. What will 16.25 pm. of cloth cost at $2.50 a meter?

2. What will 567.8 g. of beef cost at 30 cents a kilogram?

3. If 10 st. of wood cost $25, what will 36.5 st. cost?

4. If 12 of coal oil cost 75 cents, what will 5 hectoliters cost?

5. If a man travels 75 Hm. in an hour, how long will it take him to travel 3 Mm.

?

6. If cloth is bought at $4 a meter and sold at $5 a yard, how much is gained on 60 meters?

7. If wood is bought at $2 a stere and sold at $8 a cord, how much is gained on 1200 steres?

8. If molasses is bought at 50 cents a gallon and sold at 20 cents a liter, how much is gained on the sale of a hogshead containing 63 gallons?

9. If wheat is bought at 60 cents a bushel and sold at $2 a hectoliter, how much is gained on the sale of 100 bushels?

10. If land is bought at $200 an acre and sold at $10 an are, how much is gained on the sale of 150 acres?

11. A tailor buys cloth at $4.50 a yard; at what price per meter must he sell it to gain 50 cents a yard?

12. A merchant buys sugar at 5 cents a pound; at what price per kilogram must he sell it to gain 2 cents a pound?

13. A barrel of flour weighs 196 pounds; what metric number expresses its weight?

14. Express in metric numbers the rate of a train running 30 miles an hour.

15. A farm contains 150 acres; what is its area in ares? 16. A car weighs 56000 pounds; what is its weight in metric tons?

17. If the longitudes of two places on the equator differ by 10° 40′, what is the distance between the two places in kilometers, a degree being 69 miles?

18. If the distance to the moon is 240000 miles, how many kilometers is it from the earth?

19. If 40 meters of cloth cost $240, what will 60 yards. cost?

20. If a bar of metal weighs 24 lb. to the foot, how many kilograms does it weigh to the decameter?

ANSWERS TO WRITTEN EXERCISES.

Page 19.-Ex. 3. 157; 4. 142; 5. 182; 6. 189; 7. 180; 8. 193; 9. 206; 10. 156; 11. 174; 12. 112; 13. 133; 14. 124; 15. 226; 16. 173; 17. 142; 18. 203; 19. 199; 20. 249; 21. $1270; 22. $733; 23. $1647; 24. $2085; 25. $17.26; 26. $10.10; 27. $17.41; 28. $12.88.

Page 20.—Ex. 29. 88; 30. 223; 31. 277; 32. 170; 33. 107; 34. 126; 35. 185; 36. 1675; 37. 2506; 38. 1946; 39. 1203; 40.2123; 41. 1313; 42. 1488; 43. 168; 44. 180; 45. 158; 46.75; 47. 161; 48. 89; 49. 181; 50. 3191; 51. 3238; 52. 3191; 53. 2886; 54. 3092; 55. 2350; 56. 2583; 57. 3172; 58. 2174; 59. 1482; 60. 2360; 61.969; 62.851; 63. 1763; 64. 992; 65. 1441; 66. 2545; 67. 2255; 68. 2176; 69. 2280; 70. 2162; 71. 2452; 72. 2126; 73. 1045; 74. 1471; 75. 2469; 76. 20061; 77. 30074; 78. 22529; 79. 31662; 80. 33576; 81. 31370; 82. 104367.

Page 21.-Ex. 83. 2564; 84. 3448; 85. 2856; 86. 3117; 87. 1948; 88. 2000; 89. 1814; 90. 2272; 91. 2552; 92. 1399; 93. 3279; 94. 3652; 95. 2431; 96. 4018; 97. 1598; 98. 2257; 99. 1944; 100. 1612; 101. 2858; 102. 3111; 103. 226155.- -1. $1051; 2.706 miles; 3. 20694 lb.; 4. 2999 eggs; 5. $89.88; 6. 264 flowers, $19.35; 7. 489.

Page 22.-Ex. 8. $38.50; 9. $599.15; 10. $104.44;

11. 1,343,374;

12. $166,450; 13. $8775; 14. $8360; 15. 5,760,585.

Page 23.-Ex. 16. $1,432,420,266; 17. $688,965,549,176.65; 18. 1230; 19. 4560; 20. 7890; 21. 51762; 22. 58434.

Page 24.-Ex. 23. 8325; 24. 7665; 25. 91804; 26. 91337; 27. $87951.51.

Page 25.-Ex. 28. 912880.

Page 28.-Ex. 2. 164; 3. 441; 4. 511; 5. 253; 6. 653; 7. 624; 8. 2223; 9. 7721; 10. 1331; 11. 1412; 12. 6350; 13. $7722.02; 14. $56320.42; 15. $42431.02; 16. 35502; 17. 50223; 18. 40432; 19. 60000.

-1. $160; 2. $1410; 3. 4345 men; 4. $5504; 5. 1520 bu.; 6. $5530; 7. $1120; 8. $2130.

Page 29.—Ex. 4. 425; 5. 207; 6. 176; 7. 738; 8. 257; 9. 187; 10. 368; 11. 178; 12. 286; 13. 265.

Page 30.-Ex. 14. $106.08; 15. $598.91; 16. $360.16; 17. $682.50; 18. $243.66; 19. 37139; 20. 56288; 21. 31346; 22. 44328; 23. 63; 24. 448; 25. 126; 26. 240; 27. 648; 28. 523; 29. 322; 30. 197; 31. 330; 32. 522; 33. 1143; 34. 754; 35. 1031; 36. 354; 37. 652; 38. 1054; 39. 312; 40.588; 41. 780; 42. 134; 43. 322; 44.712; 45. 1108; 46. 230; 47. 3324; 48.724; 49. 27747; 50. 460702; 51. 493889; 52.810299; 53. 383807; 54. 132790; 55. 403322; 56. 530865; 57. 5,741,182; 58. 8,727,606; 59. 1,731,502; 60. 6,999,767; 61. $58,388,316; 62. $35,132,192; 63. $1.326,249.67; 64. $1,228,611; 65. 51; 66. 186; 67. 392; 68. 132; 69. 253; 70.631; 71. 202; 72.733; 73. 880; 74. 1596; 75. 2326; 76.

5629; 77. 7389; 78. 135346; 79. 325; 80. 3697; 81. 3333; 82.6728; 83. 5939; 84. 642; 85. 3205; 86. 2193; 87. 2907; 88. 2214; 89. 999; 90.3758.

Page 31.-Ex. 91. 1894; 92. 13416; 93. 6245; 94. 2090; 95. 97,991; 96. $36.26.- -1. $4470; 2. 2860; 3. 3812; 4. 21636; 5.* $7832; 6. 4455; 7. $7617.25; 8. $300; 9. $824; 10. $339; 11. $2373. Page 32.-Ex. 12. $4,465,497.65; 13. $812665.89; 14. 50141; 15. $40,084,066.14.

Page 35.-Ex. 3. 69; 4. 180; 5. 305; 6. 615; 7. 4936; 8. 9648; 9. $25.38; 10. $37.24; 11. $49.12; 12. $47.88; 13. $9.72; 14. $257.30; [4] 15. 8544; 16. 12568; 17. 24568; 18. 32864; 19. 21728; 20. 6472; 21. 17.264; 22. 34836; 23. 21968; 24. 24688; 25. 20024; 26. 12480; 27. 24200; 28. 28356; 29. 20568; 30. 16864; 31. 31452; 32. 18268; [5] 33. 10680; 34. 15710; 35. 30710; 36. 41080; 37. 27160; 38. 8090; 39. 21580; 40. 43545; 41. 27460; 42. 30860; 43. 25030; 44. 15600; 45. 30250; 46. 35445; 47. 25710; 48. 21080; 49. 39315; 50. 22835; [6] 51. 12816; 52. 18852; 53. 36852; 54. 49296; 55. 32592; 56. 9708; 57. 25896; 58. 52254; 59. 32952; 60. 37032; 61. 30036; 62. 18720; 63. 36300; 64. 42534; 65. 30852; 66. 25296; 67.47178; 68. 27402; [7] 69. 14952; 70. 21994; 71. 42994; 72. 57512; 73. 38024; 74. 11326; 75. 30212; 76. 60963; 77. 38444; 78. 43204; 79. 35042; 80. 21840; 81. 42350; 82. 49623; 83. 35994; 84. 29512; 85.55041; 86. 31969; [8] 87. 17088; 88. 25136; 89. 49136; 90. 65728; 91. 43456; 92. 12944; 93. 34528; 94. 69672; 95. 43936; 96. 49376; 97. 40048; 98. 24960; 99. 48400; 100. 56712; 101. 41136; 102. 33728; 103. 62904; 104. 36536; [9] 105. 19224; 106. 28278; 107. 55278; 108. 73944; 109. 48888; 110. 14562; 111. 38844; 112. 78381; 113. 49428; 114.55548; 115. 45054; 116. 28080; 117. 54450; 118. 63801; 119. 46278; 120. 37944; 121.70767; 122. 41103.

Page 36.-Ex. 123. 1230; 124. 2945; 125. 2736; 126. 4734; 127. 3934; 128. 4746; 129. 2856; 130. 3312; 131. 12030; 132. 18270; 133. 29470; 134. 9728; 135. 170247; 136. 1,730,496; 137. 28,459,548; 138. 200,138,105; 139. 1,111,111,101; 140. 8,888,888,889.-1. $1485.90;

2. 10080 ft.; 3. 1,490,640 mi.; 4. 36960 ft.; 5. $130.50; 6. $2837.25; 7. $25734.40; 8. 1,680,000 mi.; 9. 63400 mi.; 10. 15840 yd.; 11. $42.75.

Page 37.-Ex. 3. 3024; 4.5580; 5. 16192; 6. 13650; 7. $416.50; 8. $703.50; 9. $1031.22; 10. $2004.66; 11. 10624; 12. 23604; 13: 22875; 14. 40664.

Page 38.-Ex. 15. 4878; 16. 6552; 17. 12768; 18. 10998; 19. 34782; 20. 21216; 21. 31476; 22. 28560; 23. 56826; 24. 39042; 25. 40824; 26. 44030; 27. 49950; 28. 39641; 29. 38552; 30. 67068; [16] 31. 3456; 32. 4832; 33.6656; 34.6688; 35. 5056; 36. 8384; 37. 9888; 38. 14528; 39. 13792; 40. 6912; 41. 9072; 42. 14288; 43.6736; 44. 7712; 45. 14736; 46. 10224; 47.6640; 48. 12624; 49. 3744; 50. 11280; 51. 15696; 52.7824; 53. 9952; 54. 14880; [56] 55. 12096; 56. 16912; 57. 23296; 58. 23408; 59. 17696; 60. 29344; 61. 34608; 62. 50848; 63. 48272; 64. 24192; 65. 31752; 66. 50008; 67.23576; 68. 26992; 69. 51576; 70. 35784; 71. 23240; 72. 44184; 73. 13104; 74. 39480; 75. 54936; 76. 27384; 77. 34832; 78. 52080; [84] 79.

144.

18144; 80. 25368; 81. 34944; 82. 35112; 83. 26544; 84. 44016; 85. 51912; 86.76272; 87. 72408; 88. 36288; 89. 47628; 90.75012; 91. 35364; 92. 40488; 93. 77364; 94. 53676; 95.34860; 96.66276; 97. 19656; 98. 59220; 99. 82404; 100. 41076; 101. 52248; 102. 78120; [92] 103. 19872; 104. 27784; 105. 38272; 106. 38456; 107. 29072; 108. 48208; 109. 56856; 110. 83536; 111. 79304; 112. 39744; 113. 52164; 114. 82156; 115. 38732; 116. 44344 117. 84732; 118. 58788; 119. 38180; 120. 72588; 121. 21528; 122. 64860; 123. 90252; 124. 44988; 125. 57224; 126. 85560; [123] 127. 26568; 128. 37146; 129. 51168; 130. 51414; 131. 38868; 132. 64452; 133. 76014; 134. 111684; 135. 106026; 136. 53136; 137. 69741; 138. 109839; 139. 51783; 140. 59286; 141. 113283; 142. 78597; 143. 51045; 97047; 145. 28782; 146. 86715; 147. 120663; 148. 60147; 149. 76506; 150. 114390; [234] 151. 50544; 152. 70668; 153. 97344; 154. 97812; 155. 73944; 156. 122616; 157. 144612; 158. 212472; 159. 201708; 160. 101088; 161. 132678; 162. 208962; 163. 98514; 164. 112788; 165. 215514; 166. 149526; 167. 97110; 168. 184626; 169. 54756; 170. 164970; 171. 229554; 172. 114426; 173. 145548; 174. 217620.- -178. 430848; 179. 286875; 180. 66,636; 181. 458763; 182. 1,259,268; 183. 504944; 184. 2,560,272; 185. 757442; 186. 1,126,248; 187. 464370; 188. 1,966,707; 189. 4,122,841; 190. 6,440,772; 191. 26,685,165; 192. 16,148,945; 193. 6,526,083; 194. 9,084,096; 195. 14,903,838; 196. 75,762,742; 197. 54,361,883; 198. 19,387,500; 199. 297,892,224; 200. 293,365,653; 201. 129,030,680.

Page 39.-Ex. 1. $16524; 2. $4320; 3. $28,575; 4. $1680.75; 5. 27,454 gal.; 6. 1,173,840 lb.; 7. $3997.50; 8. $1716.75; 9. 353275 men; 10. $21091.84; 11. $11014.12; 12. 2,694,580 lb.; 13. 157680 hr.; 14. 13570 mi.; 15. $3304.35.

Page 40.-Ex. 16. $2754.72; 17. $92,954,802.12; 18. 67,715,672; 19. 62,982,234; 20. $8,467,313.19; 21. 37,944,731; 22. $44,186,296; 23. $944,733,510; 24.795041; 25. 1,555,515; 26. 4,390,009; 27. 6,982,534; 28. 103,770,134; 29. 139,063,041; 30. 2,597,716; 31. 3,232,042; 32. 9,333,654; 33. 120,884,412; 34. 15,223,824; 35. 30,417,442; 36. 1,111,111,101; 37. 2,222,222,202; 38. 3,333,333,303; 39. 4,444,444,404; 40. 5,555,555,505; 41. 8,888,888,889; 42. 17,777,777,778; 43. 26,666,666,667; 44. 35,555,555,556; 45. 44,444,444,445; 46. 90,810,081; 47. 10,079,918,991; 48. 90,900,891,081; 49. 1,019,090,909; 50. 3,087,542,754.

Page 41. Ex. 6. 129,000; 7. 884,000; 8. 16,064,000; 9. 3,604,200,000; 10. 603,203,200.- -1. 1,056,000 ft.; 2. 840000 gr.; 3. 3,097,600 sq. yd.

Page 42.-Ex. 4. 920000 lb.; 5. $30000; 6. 132,000,000 ft.; 7. 24000 sq. rd.- -1. $112; 2. $1377; 3. $2,220,000; 4. 86400 sec.; 5. 13440 bu.; 6. 864360 lb.; 7. 887500; 8. 28086.

Page 45.-Ex. 3. 288; 4. 227; 5. 321; 6. 375; 7. 3443; 8. $324; 9. $428; 10. $759; 11. $7.11; 12. $20.04.

Page 46.-Ex. 13. 1189; 14.1659; 15. 671; 18. 456; 19. 208; 20. 5401; 21. 957; 22. 4394; 25.847; 26. 996§; 27. 162; 28. 143; 29. 1341;

.

16. 1156; 17. 432; 23.507; 24.1646; 30. 141; 31. 1124;

« ΠροηγούμενηΣυνέχεια »