Today, we will begin this unit by looking at the divisibility rules. I have prepared an outline for each student to fill out as we look at the new vocabulary and divisibility rules. Students should keep this outline to help them with their homework and to study for the upcoming quiz and test. The first quiz will be this Friday, and will cover divisibility rules and prime and composite numbers. It will be fairly simple and look a lot like the homework from this week. Below is the outline that students will receive
Divisibility Rules
A number is divisible by…. | Divisible | Not divisible |
2 if the last digit is even (0, 2, 4, 6, 8). | ||
3 if the sum of the digits is divisible by 3 | ||
4 if the last two digits form a number divisible by 4 | ||
5 if the last digit is 0 or 5 | ||
6 if the number is divisible by both 2 and 3 | ||
9 if the sum of the digits is divisible by 9 | ||
10 if the last digit is 0 |
Factor -
Divisibility -
Prime numbers 1 -50 (highlighted)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
