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Activity 12:
SUMthing to Do
A. Find the sum of each of the following.
1. integers from 1 to 50
2. odd integers from 1 to 100
3. even integers between 1 and 101
4. first 25 terms of the arithmetic sequence 4, 9, 14, 19, 24, ...
5. multiples of 3 from 15 to 45
6. numbers between 1 and 81 which are divisible by 4
7. first 20 terms of the arithmetic sequence -16,-20,-24, ..
8. first 10 terms of the arithmetic sequence 10.2, 12.7, 15.2, 17.7, ...
9. 1+5+9+...+49 +53
135
10. +-
222
17 19
+
2 2