Math lesson 4.pptx........................

math

1. Lesson 4: Using Divisibility rules for 2, 5 and 10 to find common factors Prepared by: ADORA A. VILLANUEVA FBMS PAGSANJAN, LAGUNA

2. Mental Drills on Easy Division a . 248÷ 4 = n b. 126 ÷ 3 = n c. 522 ÷ 6 = n d. 255 ÷ 5 = n

3. Give the first three multiples of: 1.4 2.3 3.5 4.6 5.8

4. Playing “the boat is sinking ” or let them sing the song of Divisivility Rules

5. On a certain bakery, there were 230 monay breads to be placed on trays. The baker wants to arrange them in either 2, 5 or 10 rows. Would it be possible for him to arrange the breads? How many monay breads were in the bakery? What does the problem asked you to find? How will you find the answer to the problem? Presentation :

6. Group Activity

7. Jaira has 70 collected stamps. Can she shared that equally to 2 friends? 5 Friends? 10 friends? To solve the problem, you need to know if 2 5 and 10 are factors of 70 or if 70 is divisible by 2 5 and 10. To see if the number is divisible by 2, 5 or 10 ,test by checking the ones digit DIVISIBILITY TEST 70 By 2: Is the ones digit 0,2,4,6 or 8? YES By 5: Is the ones digit 0 or 5? YES By 10: Is the ones digit 0? YES    

8.   2 5 10 6345       8000       4970       2560       Put a check under the correct column applying the rules for divisibility.

9. Get Moving   2 5 10 54180       912       2700       5605       568       3765       233       80       A . Put a check under each column to identify whether each number is divisible by 2, 5 or 10.

10. Summarizing the Lesson How do we find the factors of a number using divisibility rules? • We recall and apply the rules on divisibility for 2, 5 and 10.  Divisibility rule for 2 All even nos. are divisible by 2  Divisibility rule for 5 Numbers ending in 0 and 5 are divisible by 5  Divisibility rule for 10 Numbers ending in 0 are divisible by 10

11. Apply Your Skills! Use divisibility rules to help you solve the following problems.   Frances has a collection of 672 stamps. She wants to place the stamps in 2 envelopes .Can she place the same number of stamps in each envelope?   2.   The number of books in Karla’s collection is divisible by 2,5 and 10. She has more than 11 books and fewer than 25 books. How many books does Karla have ?

12. Assessment Using the divisibility rule, encircle the numbers whose factors are the given number before each item. 2__ _ 1. 88 470 90 294 5__ __ 2.5000 7528 6010 845 10_ __ 3.370 950 840 530 10____ 4.370 355 3455 140 5 ___ 5.470 830 525 450  

13. D. Home Activity Remediation Write on the blank before each item whether the given number is divisible by 2, 5 and 10 16 _______ 125 ______ 30 _______ 344 ______ 650 ______