Lesson 3.5
Lesson Objectives:
* Add mixed numbers with or without
renaming.
* Estimate sums of mixed numbers.
November 01, 2015
Lesson 3.5
November 01, 2015
Steps in adding mixed numbers without renaming:
1. Rewrite the fractional parts as like fractions (get a common
denominator).
2. Use pictorial representation to show adding the wholes and the
fractional parts separately.
3. Add the fractional parts before adding the wholes.
Lesson 3.5
November 01, 2015
Add mixed numbers without renaming.
Maia bought 2 1/5 pounds of oranges. She also bought 1 1/2 pounds of grapes.
What is the total weight of fruit that she bought?
2 1/5 + 1 1/2 = ?
Lesson 3.5
Practice:
Add.
1. 3 1/2 + 2 4/9
November 01, 2015
Lesson 3.5
November 01, 2015
Add mixed numbers with renaming.
Serena jogged 2 3/4 miles and walked 1 1/2 miles. How many miles did she
jog and walk altogether?
Lesson 3.5
Practice.
Find the sum of the mixed numbers.
2. 2 2/3 + 3 1/2
November 01, 2015
Lesson 3.5
November 01, 2015
Lesson 3.5
November 01, 2015
Lesson 3.5
November 01, 2015
Use benchmarks to estimate sums of mixed numbers.
Estimate the sum of 2 1/3 and 3 2/5
Compare the fractional part in each mixed number to the benchmarks.
0, 1/2, and 1
Lesson 3.5
November 01, 2015
Practice:
Use benchmarks to estimate each sum.
3. 6 7/12 + 9 3/8
4. 11 5/6 + 5 5/9
Lesson 3.5
Guided Practice p. 143 #s 5-7.
November 01, 2015
Lesson 3.5
November 01, 2015