Lesson Menu Main Idea NGSSS Example 1:Add Mixed Numbers Example 2:Subtract Mixed Numbers Example...
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Transcript of Lesson Menu Main Idea NGSSS Example 1:Add Mixed Numbers Example 2:Subtract Mixed Numbers Example...
Main Idea
NGSSS
Example 1: Add Mixed Numbers
Example 2: Subtract Mixed Numbers
Example 3: Rename Mixed Numbers to Subtract
Example 4: Rename Mixed Numbers to Subtract
Example 5: Real-World Example
Five-Minute Check
• Add and subtract mixed numbers.
MA.7.A.3.2 Add, subtract, multiply, and divide integers, fractions, and terminating decimals, and perform exponential operations with rational bases and whole number exponents including solving problems in everyday contexts.
Add Mixed Numbers
Find Write in simplest form.
Add the whole numbers and fractions separately.
Simplify.
Estimate 3 + 15 = 18
Subtract Mixed Numbers
Find Write in simplest form.
Simplify.
Estimate 10 – 5 = 5
Rename the fraction using the LCD. Then subtract.
Rename Mixed Numbers to Subtract
Find
Since is less than , rename before subtracting.
Estimate
Rename Mixed Numbers to Subtract
Simplify.
Subtract the whole numbers and then the fractions.
Rename as .
Check for Reasonableness
Answer:
Find
Rename Mixed Numbers to Subtract
Using the denominator of the fraction in the subtrahend,
11 =
Since is less than rename 11 before subtracting.
Estimate 11 – 9 = 2
Rename Mixed Numbers to Subtract
Simplify.
Subtract.
Rename 11 as .
Answer:
Check for Reasonableness
CRAFTS Marlee is making necklaces and bracelets
for a class craft sale. She uses feet of string
for the necklaces and feet of string for the
bracelets. What is the total length of string that Marlee used?
Answer: The total length of the string is feet.
SEWING Nicole is making pillows to give to her
friends. She has feet of red fabric and feet
of yellow fabric. How many feet of fabric does she have in all?
A. B.
C. D.
Yesterday Michael ran miles. Today Michael
ran miles. How many more miles did Michael
run today than yesterday?
A. 1 miles
B. 1 miles
C. 2 miles
D. 2 miles
In January, the town water tower was full. In
April, it was full. By what fraction did the water
level decrease?
A. C. 1
B. D. 1