Download Divisibility - About Miss Brougham

Objectives: - to use divisibility rules for 2, 3, 4, 5, 6, 8, 9, and 10
- to identify prime and composite numbers
Divisibility
Discuss: What does divisibility mean?
Divisibility Rules
A number is
divisible by:
2
3
4
5
6
8
9
10
Examples:
if. . .
Try These:
What numbers are the following divisible by?
128
9410
17,934
270,228
Fill in the missing digit to make each number divisible by the given number.
243,05__; by 9
13,__12; by 8 and by 3
20,71___; by 4
Prime and Composite Numbers
Prime number –
Composite number –
Perfect number Examples:
Try These:
Tell whether the following is prime, composite or neither.
0
81
41
51
37,311
Objectives: - to find the prime factorization of a composite number
Prime Factorization
Prime factorization –
Examples:
Try These:
44
60
100
96
Objectives: - to find the greatest common factor of two or more numbers
Greatest Common Factor
Greatest common factor –
Examples:
Try These:
45 and 20
4, 6, and 8
39 and 104
48 and 84
Objectives: - to find equivalent fractions
Equivalent Fractions
Examples:
Try These:
With a partner, use your smart pal to complete the following pizza order.
1/4 pepperoni, 1/8 mushroom, 2/16 sausage, 2/8 plain, and 4/16 pepper.
Write each fraction as an equivalent fraction with 16 as the denominator.
Objectives: - to express fractions in simplest form
Fractions in Simplest Form
Lowest terms –
Examples:
Try These:
_15_
40
_16_
48
_3_
18
_16_
20
Objectives: - to read and write mixed numbers
- to rename a mixed number as an improper fraction, and vice versa
Mixed Numbers and Improper Fractions
Mixed number –
Improper fraction –
Examples:
Try These:
4 ¼
2½
2 1/8
12/8
15/9
44/6
Objectives: - to estimate whether a given fraction is close to 0, ½, or 1
Fraction Sense
Examples:
Try These:
13/27
17/28
¼
¾