Download Fractions: Grades 3-5

Fractions: Grades 3-5
Equivalency, Addition, and Subtraction
Druid Hills Elementary
CCSS.Math.Content.3.NF.A.3
Explain equivalence of fractions
in special cases, and compare
fractions by reasoning about
their size.
Grade 3 expectations in this domain
are limited to fractions with
denominators 2, 3, 4, 6, 8.
Which Factions are Equal
Fraction Cards
 Hexagon Cookies

Ways Make a Whole
Fractions Cards
 Hexagon Cookies

Grade 4
CCSS.Math.Content.4.NF.B.3a
Understand addition and
subtraction of fractions as joining
and separating parts referring to the
same whole.
Translation
Know that adding and subtraction
of fractions is the putting
together and taking apart of
same sized pieces from the same
whole.
Grade 4
CCSS.Math.Content.4.NF.B.3c Add and
subtract mixed numbers with like
denominators, e.g., by replacing each
mixed number with an equivalent
fraction, and/or by using properties of
operations and the relationship between
addition and subtraction.
Translation
Use what you know about
equivalency or decomposing
numbers to add and subtract
fractions.
Grade 4
CCSS.Math.Content.4.NF.B.3d Solve
word problems involving addition
and subtraction of fractions
referring to the same whole and
having like denominators, e.g., by
using visual fraction models and
equations to represent the problem.
Grade 4 expectations in this domain
are limited to fractions with
denominators 2, 3, 4, 5, 6, 8, 10, 12.
NEW!!
Making Fraction Cards
1/2
Making Fraction Cards or Coloring
Activity?
As students make the cards, what do you
need to do to ensure they are engaging in
 4.NF.1
 4.NF.2
 Others?
4.NF.2. Compare two fractions with different numerators and
different
denominators,
e.g., a/b
by creating
common
4.NF.1.
Explain
why a fraction
is equivalent
to a denominators
fraction (n × or
numerators,
by comparing
to amodels,
benchmark
such
as 1/2.
a)/(n × b) by or
using
visual fraction
withfraction
attention
to how
the
Recognize
only
whenthe
thetwo
twofractions
fractions
number andthat
sizecomparisons
of the parts are
differvalid
even
though
refer
to the same
whole.
thethis
results
of comparisons
with
themselves
are the
sameRecord
size. Use
principle
to recognize
and
symbols
=, or <, and
justify. the conclusions, e.g., by using a
generate>,equivalent
fractions
visual fraction model.
Combinations to 1
How could students prove whether the
following equation is true or false?
1
4
+
1
2
1
+6
1
+ 12
=1
But I thought students didn’t have to add
with unlike denominators! Read teacher
note p. 56
Grade 5
CCSS.Math.Content.5.NF.A.1 Add
and subtract fractions with unlike
denominators (including mixed
numbers) by replacing given
fractions with equivalent fractions in
such a way as to produce an
equivalent sum or difference of
fractions with like denominators.
Fraction Track
Thank You!
www.elementarymathematics.org
Kaneka Turner:
[email protected]
980.343.2792