1 standard 1.2 multiplying fractions problem 1 problem 4problem 3 problem 2 problem 5 problem...
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1
STANDARD 1.2
MULTIPLYING FRACTIONS
PROBLEM 1
PROBLEM 4PROBLEM 3
PROBLEM 2
PROBLEM 5
PROBLEM 8PROBLEM 7
PROBLEM 6
PROBLEM 9
AREA OF A RECTANGLE
EQUIVALENT FRACTIONS
END SHOW
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2
1.2 Add, subtract, multiply and divide rational numbers and take positive rational numbers to whole-number powers
1.2 Sumar, restar, multiplicar y dividir números racionales y elevar números positivos racionales a potencias de enteros.
GRADE 7: Number Sense
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3
Area of a Rectangle
L
A = L W
where:
W= width
L= length
A= areaW
STANDARD 1.2
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4
Find the area of the following rectangle.
7 in
A = L W
where:
W= 4 in
L= 7 in
A= ?
4 in
A = (7in)(4in)
A = 28 in2
The area of the rectangle is 28 square inches.
STANDARD 1.2
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5
of12
12
= 14
12
12
= 14
12
12
STANDARD 1.2
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6
22
33
44
66
EQUIVALENT FRACTIONS
= 24
= 36
= 48
= 6 12
FRACTION in lowest terms FRACTION IN HIGHEST TERMS
GOING FROM lowest terms to HIGHEST TERMS
12
12
12
12
= 12
STANDARD 1.2
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7
24
....
22
= 12
36
....
33
= 12
48
....
44
= 12
612
....
66 = 1
2
=12
FRACTION in lowest terms FRACTION IN HIGHEST TERMS
EQUIVALENT FRACTIONS
GOING FROM HIGHEST TERMS to lowest terms
STANDARD 1.2
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8
of13
34
= 312
34
13
= 312
13
34
STANDARD 1.2
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9
of13
34
= 312
34
13
= 312
13
34
STANDARD 1.2
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10
of13
34
= 312
34
13
13
14
....
33
= 1 4 Why?
= 312 = 1
4
FRACTION in lowest termsFRACTION IN HIGHEST TERMS
STANDARD 1.2
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11
12
112
of12
212
= 224 = 2
2412
212
STANDARD 1.2
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12
12
of12
212
= 224
12
212
= 112
Why?
....
22
112
FRACTION in lowest termsFRACTION IN HIGHEST TERMS
= 224
= 112
STANDARD 1.2
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13
12
14
of12
14
= 18 = 1
812
14
What happens when we multiply numbers greater than 1?
(3)(5) = 15
15 is greater than 3 and 5.
So, when we multiply numbers greater than 1 we get a bigger number that any of them.
When we multiply numbers smaller than 1, we get a number smaller than any of them.
Can you observe that multiplying numbers less than 1 we have one smaller that any of the
numbers in the product?18 is less than and .1
214
STANDARD 1.2
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14
12
14
of12
14
= 18 = 1
812
14
STANDARD 1.2
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15
12
34
of12
34
= 38 = 3
812
34
STANDARD 1.2
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16
12
23
of23
12
= 26 = 2
623
12
STANDARD 1.2
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17
12
23
of23
12
= 26
23
12
= 13 Why?
....
22
FRACTION in lowest termsFRACTION IN HIGHEST TERMS
= 26
= 13
STANDARD 1.2
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18
34
34
of34
34
= 916
34
34
= 916
STANDARD 1.2
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19
34
56
of34
56
=1524
34
56
=1524
STANDARD 1.2
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20
34
56
of34
56
=1524
34
56
=1524
STANDARD 1.2
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21
34
56
of34
56
=1524
34
56
....
33
= 5 8 Why?
FRACTION in lowest termsFRACTION IN HIGHEST TERMS
=1524
= 5 8
STANDARD 1.2
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