Transcript Math Night Fraction Powerpoint

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Welcome to
Grade Millridge
MATH Night!
January 29, 2014
February 26, 2014
Common Core 4.NF.A.1 Explain why a fraction
is equal to another using visual models
EX: Stella & Brian each heat up a small
pizza. Stella cuts hers into 4 equal slices.
Brian cuts his into 8 equal slices. Draw
models of Stella’s & Brian’s pizza. Now
Stella eats 2 pieces of her pizza & Brian
eats 4 pieces. Do they eat the same
amount of pizza? Explain using the
models.
Common core 4NF.A.2 Compare 2 fractions
with different numerators & denominators by
creating common denominators or by
comparing to a benchmark fraction like ½
EX: A kitchen floor has green, yellow
& white tiles. Of those, 2/5 are green
and 2/10 are yellow. Are there more
green tiles than yellow tiles? Explain
how you know this.
Common core 4NF.B.3a. Add & subtract
fractions with like denominators
EX: Amy walks 1/5 of a mile on
Monday and on Tuesday she walks
2/5 of a mile. How far did she walk
total in the 2 days?
Common core 4.NF.B.3b. Decompose a
fraction into a sum of fractions with the same
denominator
EX: Chloe used fraction strips to
show 7/8 as the sum of fractions.
Draw another way to show 7/8 as the
sum of fractions.
1
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
Common core 4.NF.B.3c. Add & subtract
mixed numbers with like denominators
Add:
1¼
+
+
2 2/4
____________________________
3¾
Common core 4.NF.B.3d. Solve word
problems involving adding & subtracting
fractions.
EX: George is mixing colors to paint a door.
He pours 3/8 cup of red paint into a can.
Then he pours 2/8 cup of blue paint into the
can. How much paint is in the can now?
Common core 4.NF.B.4a Understand a
fraction as a multiple
EX: Julie divides a board into 8 equal
pieces. Draw a model to show
Julie’s board.
A. Julie paints 3/8 of the board. How
many pieces of the board does she
paint?
B. How many pieces of the board are
not painted?
Common core 4.NF.B.4b. Multiply a fraction
by a whole number
EX: 4 x ¾ = explain how you know
answer: 4 x 3 x ¼ = 12/4 = 3
Multiply 4/7 and 2=
answer: 4 x 2 x 1/7 = 8/7 or 1 1/7
Common core 4.NF.B.4c solve word problems
involving multiplying of a fraction by a whole
number.
EX: Fern is putting lace around
napkins. For each napkin, she needs
3/5 yds. of lace. Fern will put lace
around 10 napkins. Write an
equation to solve this and explain
how many yards of lace Fern will need
total.
Common core 4.NF.C.5 Express a fraction with
a denominator of 10 as equal to a fraction
with a denominator of 100
EX: 4/10 = 40/100
EX: 4/10 + 3/100 = _____
Common core 4.NF.C.6 Find equal fractions to
decimals with denominators of 10 & 100
EX:
4/10 = 0.4
22/100 = 0.22
Common core 4.NF.C.7 Compare decimals
EX: 0.43 > 0.39
0.2 = 0.20