Finding all the Factors Divisibility Tricks Problem of
Finding all the Factors *Divisibility Tricks*
Problem of the Day Mentally Solve: 28+42
Let’s Review Find one factor pair of 14. 2 x 7 = 14 factor x factor = product
Find all the factor pairs Find all factor pairs of 12. 1 x 12 = 12
Find all the factor pairs Find all factor pairs of 12. 1 x 12 = 12 2 x 6 = 12
Find all the factor pairs Find all factor pairs of 12. 1 x 12 = 12 2 x 6 = 12 3 x 4 = 12
Find all the factor pairs Find all factor pairs of 12. Write the factors in order from least to greatest. 1 x 12 = 12 2 x 6 = 12 3 x 4 = 12 Factors of 12: 1, 2, 3, 4, 6, 12
Find all the factor pairs Find all factor pairs of 12. Factors of 12: When Did youfind reach all Check every thethe other factor side number Alwaysunder start of thepairs? rainbow the with rainbow 1 and the to you Check have with found the see ifnumber. it a factor. all. Factor of the After 1 comes 2! RAINBOW. factors! 1 2 3 4 6 12
How do I know if a number is a factor? I check to see if it is divisible. Divisible means that you can divide a number by another number and the remainder is 0. I know 2 is a factor of 12, because 12 is divisible by 2. What does divisible mean?
Is the number divisible by 2? 13 62 20 31 88 YES Do you see any patterns? NO
Which numbers are a factor of 45. Ⓐ 1 Ⓑ 2 Ⓒ 3 Ⓓ 5 Ⓔ 10 Ⓕ 15
Let’s find all of the factors of 72… • 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
On Your Own • 1) Page 199 -200 #3, 5, 10, 13, 17 • 2) Math Choice Board
- Slides: 13