Do each of the following additions with the two-color counters. Draw a sketch
of your addition for
problems 1 and 2; on the other problems use the counters to add and write
your answer on this paper. Do not use a calculator on any of this exercise.
1. 4 + 3 = _____ 2. 5 + 4 = _____
3. 6 + 1 = _____ 4. 8 + 3 = ______ 5. 4
+ 6 = _______
6. State a rule for adding two positive numbers. _________________________________
_____________________________________________________________________
Add the following without using counters.
7. 121 + 357 = ________ 8. 432 +
974 = ________
9. 713 + 99 = _________ 10. 38 + 1705
+ 938 = _________
Do each of the following additions with the two-color counters. Draw a sketch
of your addition for problems 11, 12, and 13: on the other problems use
the counters to add and write your answer on this paper.
11. -6 + (-2) = ________ 12. -9 +
(-3) = ________
13. -6 + (-7) = _________ 14. -4 + (-8)
= _________
15. -7 + (-7) =________ 16. -9 + (-6) = ________
17.12 + (-2) = ________
18. - 5 + (-7) = ________ 19. -10 + (-5) = _______
20. -8 + (-9) = ________
21. Write a rule for adding two negative numbers. ______________________________________
___________________________________________________________________________
Add the following without using the counters.
22. -345 + (-65) = ________ 23. -973 + (-1470)
= _________
24. - 91 + (-37) + (-54) = _________ 25. -863 + (-45) +
(-702) = ________
26. -1976 + (-3674) = _________ 27. -935 + (-748)
= _________
Do each of the following additions with the two-color counters. Draw a sketch
of your addition for
problems 28 - 33; on the other problems use the counters to add and write
your answer on this paper.
28. -6 + 9 = _________ 29. 8 + (-4)
= _________
30. -9 + 10 = _________ 31. 7 + (-11)
= _________
32. -7 + 10 = _________ 33. 4 + (-9) =
_________
34. -8 + 7 = _________ 35. -2 + 2 = _________
36. 4 + (-13) = ________
37. -7 + 12 = ________ 38. 16 + (-3) = ________
39. -16 + 3 = ________
40. -9 + 12 = ________ 41. 9 + (-12) = _________
42. Write a rule for adding a positive number and a negative number. _______________________
_________________________________________________________________________
Add the following without the use of the counters.
43. -150 + 423 = ______ 44. 243 + (-984) = ______
45. 641 +(-28)=______
46. -46 + 98 = _______ 47. -73 + 61 = _______
48. 73 + (-61) = ______
49. -136 + 79 = ______ 50. -79 + 136 = _______
51. 88 + (-49) = ______
Add the following. You may use the rules you wrote or the counters. You
may draw sketches (if you prefer) of the counters. However, you may not
use a calculator.
52. 4 + (-12) = ______ 53. -l l + 32 = ______
54. (-15) + 13 = ______
55. -7 + 20 = _______ 56. -18 + (-23) = _______
57. -12 + 14 = _______
58. 31 + 43 = _______ 59. -9 + 62 = _______
60. 83 + (-19) = ______
61. 37 + 49 = _______ 62. -37 + 49 = ______
63. 37 + (-49) = ______
64. -37 +(-49) = ______ 65. 49 + (-37) = ______
66. -49 + 37 = ______