Fraction Benchmark Numbers
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Lesson Plans and Worksheets for Grade 5
Lesson Plans and Worksheets for all Grades
More Lessons for Grade 5
Common Core For Grade 5
Videos, examples, and solutions to help Grade 5 students learn how to use fraction benchmark numbers to assess reasonableness of addition and subtraction equations.
Common Core Standards: 5.NF.1, 5.NF.2
New York State Common Core Math Grade 5, Module 3, Lesson 13
Lesson 13 Application Problem
Mark jogged 3 5/7 km. His sister jogged 2 4/5 km. How much farther did Mark jog than his sister?
Lesson 13 Concept Development
Problem 1
1/2 + 3/4
Problem 2
1 2/5 - 2/3
Problem 3
4/10 + 2/3
Problem 4
4/10 + 2/9
Problem 5
1 4/7 - 9/10
Problem 6
4/5 - 1/8
Problem 7
2 1/3 + 3 1/5 _____ 6 + 7/8
Problem 8
4 9/10 - 1 1/8 ____ 2 1/2 + 2/7
Lesson 13 Problem Set
- Are the following greater than or less than 1? Circle the correct answer.
a) 1/2 + 2/7, greater than 1 or less than 1
b) 5/8 + 3/5, greater than 1 or less than 1
c) 1 1/4 - 1/3, greater than 1 or less than 1
d) 3 5/8 - 2 5/9, greater than 1 or less than 1 - Are the following greater than or less than 1/2? Circle the correct answer.
a) 1/4 + 2/3, greater than 1/2 or less than 1/2
b) 3/7 - 1/8, greater than 1/2 or less than 1/2
c) 1 1/7 - 7/8, greater than 1/2 or less than 1/2
d) 3/7 + 2/6, greater than 1/2 or less than 1/2 - Use > , < , or = to make the following statements true.
a) 5 2/3 + 3 3/4 ____ 8 2/3
b) 4 5/8 - 3 2/5 ____ 1 5/8 + 2/5
c) 5 1/2 + 1 3/7 ____ 6 + 13/14
d) 15 4/7 - 11 2/5 ____ 4 4/7 + 2/5
Lesson 13 Homework
5. A tree limb hangs 5 1/4 feet from a telephone wire. The city trims back the branch before it grows within 2 1/2 feet of the wire. Will the city allow the tree to grow 2 3/4 more feet?
6. Mr. Kreider wants to paint two doors and several shutters. It takes 2 1/8 gallons of paint to coat each door and 1 3/5 gallons of paint to coat his shutters. If Mr. Kreider buys three 2-gallon cans of paint, does he have enough to complete the job?
Lesson 13 Homework
This video shows how to estimate the reasonableness of sums and differences of fractions by comparing them to zero, one half, and one whole.
- Are the following greater than or less than 1? Circle the correct answer.
a) 1/2 + 4/9 is greater than 1 or less than 1 - Are the following greater than or less than 1/2? Circle the correct answer.
e) 1/5 + 1/4 is greater than 1/2 or less than 1/2 - Use > , < , or = to make the following statements true.
i) 5 4/5 + 2 2/3 _____ 8 3/4
j) 3 4/7 - 2 3/5 _____ 1 4/7 + 3/5
Lesson 13 Homework
- Are the following greater than or less than 1? Circle the correct answer.
a) 1/2 + 4/9 is greater than 1 or less than 1
d) 4 3/5 - 3 3/4 is greater than 1 or less than 1
- Use > , < , or = to make the following statements true.
i) 5 4/5 + 2 2/3 _____ 8 3/4
j) 3 4/7 - 2 3/5 _____ 1 4/7 + 3/5
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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