6. A man rode 68 miles in the cars on one day, and 59 miles the next; how many miles did he travel in all? 7. Jane has 13 pins in her cushion, and Mary has 28 in hers; how many pins in both cushions? 8. There are 2 bags of coffee in the closet, the first contains 26 pounds, the second, 18 pounds; how many pounds in both bags? BLACKBOARD EXERCISES. In which the sum of the tens does not exceed nine. MODEL OPERATION. 828 234 861 939 581 631 701 838 931 422 715 467 973 865 647 467 839 622 12, 8, 15; 1295. FORM. 400 and 800 are 1200; 67 and 28 are 95; 1200 and 95 are 1295. ILLUSTRATION.-12, 8, 15; 1295: 10, 6, 13; 1073: 14, 8, 3; 1483. 1. A man rode 45 miles on one day, and 67 miles on another; how many miles did he ride on both days? 2. A man sold 80 pounds of butter at one time, and 68 pounds at another time; how many pounds did he sell in all? 3. A man paid 78 dollars for 9 calves, and 38 dollars for 20 sheep; how much did both cost? 4. Henry had 38 cents after he had given away 46; how many cents had he at first? 5. Andrew gave away 27 cents, and had 46 remaining; how many cents had he at first? 6. 20 oranges cost 76 cents; 40 apples cost 87. cents; how much did both cost? 7. A farmer gave $109 for some sheep, and $56 for a cow; how much did he give for both? 8. A lady paid $220 for a carpet, and $620 for other furniture; how much did she pay out in all? LESSON VI. BLACKBOARD EXERCISES. In which the sum of the tens exceeds nine. FORM.-400+800-1200; 74+96=170; 1200+ 170=1370. Rule.-Write the sums of the hundreds, tens, and units separately; add the tens of each sum to the units of the preceding sum; thus: 12, 16, 10; 1 (2+1) (6+1) 0; 1370. PROBLEMS. 1. How many are 10+1? 30--2? 50+3? 70+7? 90+4? 20+6? 40+1? 60+9? 80+8? 100+2? 2. How many are 21+2? 41+2? 51+2? 61+7? 81+9? 91+7? 11+9? 31+7? 71+5? 101+6? 3. How many are 22+6? 32+4? 12+5? 42+3? 52+8? 62+3? 82+7? 72+5? 102+8? 92+7? 4. How many are 13+5? 23+7? 33+6? 53+8 43+4 63+5? 73+4? 83+8? 103+7? 93+6? 5. How many are 24+8? 64+5? 84+12? 14+8? 54+6? 74+8? 94+6? 34+3? 104+7? 24+6? 6. How many are 35+4? 65+3? 85+7? 95+10? 25+62 85+4? 75+9? 45+3? 105+9? 115+6? 7. How many are 16+3 36+9? 46+5? 76+8? 86+4? 26+7? 96+10? 106+9? 116+8? 16+5? 8. How many are 27+8? 37+6? ·47+4? 97+3? 107+6? 127+10? 17+8? 57+9? 67+7? 77+38 9. How many are 28+8? 58+9? 68+6? 78+7? 98+9? 48+4? 38+3? 128+5? 68+7? 88+8? 10. How many are 19+6? 29+5? 39+4? 59+7? 99+9? 89+3? 49+8? 59+8? 39+3? 11. Ilow many are 6, 8, and 3? 4, 8, and 9? 3, 7, and 8? 5, 4, and 7? 9, 5, and 4 6, 4, and 7? 4, 3, and 10? 7, 8, and 2? 6, 5, and 4? 2, 8, and 9? 12. How many are 3, 7, and 12? 5, 9, and 7? 6, 4, and 5? 12, 2, and 7? 4, 10, and 6? 8, 4, and 6? 2, 8, and 4? 5, 8, and 11? 6, 9, and 3? 4, 2, and 7? 9, 2, and 9? 13. How many are 5, 8, and 7? 6, 2, and 9? 3, 4, and 10? 4, 7, and 8? 9, 6, and 3? 12, 3, and 5? 7, 6, and 2? 4, 6, and 10? 5, S, and 6? 14. How many are 6, 3, 3, 12, and 9? 4, 10, and 8? 8? 5, 7, and 8? 6, 8, and 9? 5, 4, and 7? 8, 10 and 3? 8, 4, and 10? 5, 8, and 7 ? 9, 6, and 2? 4, 3, and 15. How many are 9, 11 and 2? 6, 9, and 3? 4, 3, and 7 6, 8, and 7? 6? 15, 2, and 9? 12, 4, and 5? and 11? 14, 3, and and 8 10 3, and 7? 4, 6, 16. How many are 3, 4, and 16? 4, 6, and 5? 6, 17, and 6 4, 7, and 12? 4, 7, and 14? 9, 11, and 16? 17. A man bought 6 apples at one time, 14 at another time, and 11 at another time; how many did he buy in all? FORM.-46+30=76; 76+6=82; 82+20=102; 102+7=109. 5. Rule. V. To the first number add the tens and units of each number consecutively; thus: 46, 76, 82, 102, 109; 83, 143, 150, 200, 204, &c. PROBLEMS. 1. James gave 118 cents for a squirrel, 282 cents for a cage, and 215 cents for nuts; how much did he pay in all? 2. An orchard contains 15 cherry trees, 37 plum trees, and 45 apple trees; how many trees are in the orchard? 3. James is 19 years old, John 20, and Charles 22; what is the sum of their ages? 4. A farmer bought a horse for 65 dollars, a saddle for 16 dollars, and a bridle for 9 dollars; what did he pay for all? 5. A lady bought a piece of tape for 10 cents, a |