Example of Mathematics Lesson Plan:Estimating Sums

1. Objective/s:

   Estimate the sum of 3 to 6- digit addends

2. Subject Matter:
1. Estimating Sums
2. Integration: Character Education: Love for reading and care for books
3. References/ Materials:
1. Math handbook,
2. Charts on estimating sums
4. Procedure:
1. Drill
   Add the short way

   5396 2735 1620

   34278 26512 45967

   153106 245893 421352

2. Review:

   Round to the nearest:

   	Ten	Hundred	Thousand	Ten thousand
   12346	12350	12400	12000	10000
   47982
   82196
   51721
   38278
   92193

3. Presentation:

   Some district of Makati received the following number of mathematics books: 1, 10 169; district 11, 11 050 and district 111, 11 120. About how many books were given to these districts?

   About how many books were given to these districts?

   To estimate the total number of these books, we can round of the numbers to the nearest thousand

   
                 10169 = 10000
                 11050 = 11000
                 11120 = 11000 
   

   About 32 000 Math books were delivered at some schools in Makati

   Character Education Integration:

   Do you love reading books? What good thins do you get from reading? How should you take care of your books?

4. Practice Exercise:

   Estimate the sums of the following:

          6210= _________         18933= _________
          7928= _________         17173= _________    
          2768= _________         53143= _________
          8210= _________         49621= _________
   

5. To estimate sums, round off the addends to the nearest 1000's 4 digit numbers, 10 000's for 5 digit numbers, 100 000;s for 6 digit numbers
6. Fixing skills
1. Estimate the sums:

   698    2324   4851   16240   210681
   210    5785   3203   12685   382450
   

2. Game:
3. Group seatwork:
4. Distribute 5 slips of paper with written addition combinations of 3 to 6- digit addends to each group. The first two group to post their correct answer (in manila paper )wins.
5. Evaluation:

   Estimate the sums of the following:

   521 + 280	6762 + 4245	8320 + 5932
   31726 + 70314	123671 + 478530

6. Assignment:

   Answer exercises in estimating sums in the Math textbook.