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Transcript
SC HOOL
Chapter
4
HOME
to
Connections
Multiplying and Dividing Fractions
and Mixed Numbers
Dear Family,
Vocabulary to Practice
In this chapter, your child will learn to multiply and divide fractions
and mixed numbers. The work will include:
tNVMUJQMZJOHXJUIQSPQFSBOEJNQSPQFSGSBDUJPOTBOE
mixed numbers
tEJWJEJOHGSBDUJPOTCZXIPMFOVNCFST
)FSFJTIPXXFmOE 3 = 8 .
4
9
'%%.BVgh]Vaa8VkZcY^h]>ciZgcVi^dcVaH^c\VedgZEg^kViZA^b^iZY#8den^c\^heZgb^iiZY0hZZeV\Z^^#
= 8 = 24
9
24
36
36
A proper fraction has a
numerator less than its
denominator. Its value is less
than 1.
An improper fraction has a
numerator greater than or
equal to its denominator.
Step 1: Multiply the numerators, Step 2: Simplify the product.
then multiply the denominators.
3
4
A common factor is a number
that is a factor of two or more
numbers.
=2
3
A mixed number is made up of
a whole number and a fraction.
Activity
1
5
The following activity will encourage your child to express the
concept behind multiplying fractions in his or her own words.
Give your child a circular piece of paper and markers.
t"TLIJNPSIFSUPTIBEFIBMGUIFDJSDMFZFMMPX5IFOBTLZPVS
is the reciprocal of 5 or 5.
1
1
2
1
4
child to shade 1 of the yellow part in red.
4
t/PXBTLZPVSDIJMEUPmOEUIFQSPEVDUPG 1 and 1 .
2
4
t)FMQZPVSDIJMETFFUIBUUIFQPSUJPOTIBEFESFEPOUIF
1
8
circular piece of paper is 1 of the total circle because it
8
is 1 = 1 of the circle.
2
4
School-to-Home Connections
5ASch_Home_NEW.indd 11
11
3/27/09 3:14:15 PM
Conexiones entre
ESCUELA
4
Multiplicación y división de
fracciones y números mixtos
Vocabulario para practicar
Estimada familia:
&OFTUFDBQÓUVMPTVIJKPBQSFOEFSÈBNVMUJQMJDBSZEJWJEJS
GSBDDJPOFTZOÞNFSPTNJYUPT&MUSBCBKPJODMVJSÈ
tNVMUJQMJDBSGSBDDJPOFTQSPQJBTFJNQSPQJBTZOÞNFSPT
mixtos
tEJWJEJSGSBDDJPOFTQPSOÞNFSPTFOUFSPT
"TÓFTDPNPSFTPMWFNPT 3 = 8 .
4
9
Paso 1: Multiplicar los
Paso 2: Simplificar el
numeradores, luego, multiplicar producto.
los denominadores.
3
4
= 8 = 24
24
36
36
9
=2
t1ÓEBMFRVFTPNCSFFMBNJUBEEFMDÓSDVMPDPOBNBSJMMP
-VFHPQÓEBMFRVFTPNCSFF 1 de la parte amarilla con rojo.
4
t"IPSBQÓEBMFRVFIBMMFFMQSPEVDUPEF 1 y 1 .
2
Una fracción impropia tiene un
numerador mayor o igual a su
denominador.
SPKPFOFMQBQFMDPOGPSNBEFDÓSDVMPFT 1 EFMDÓSDVMPUPUBM
porque es 1 = 1 EFMDÓSDVMP
4
8
es el recíproco de 5 ó 5.
1
1
2
1
4
4
t"ZVEFBTVIJKPBPCTFSWBSRVFMBQPSDJØOTPNCSFBEBDPO
5ASch_Home_NEW.indd 12
Una fracción propia tiene
un numerador menor que su
denominador. Su valor es menor
que 1.
1
5
La actividad a continuación promoverá que su hijo exprese el
concepto detrás de la multiplicación de fracciones con sus propias
palabras. Déle a su hijo un papel de forma circular y marcadores.
12
Un factor comúnFTVOOÞNFSP
que es un factor de dos o más
OÞNFSPT
Un número mixto está
DPNQVFTUPQPSVOOÞNFSPFOUFSP
y una fracción.
3
Actividad
2
CASA
1
8
'%%.BVgh]Vaa8VkZcY^h]>ciZgcVi^dcVaH^c\VedgZEg^kViZA^b^iZY#8den^c\^heZgb^iiZY0hZZeV\Z^^#
Capítulo
y
Math in Focus Grade 5
3/27/09 3:14:16 PM